Blocked Restrainers Patents (Class 430/960)
  • Patent number: 7442495
    Abstract: The invention provides a photothermographic material containing an image forming layer having at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent, and a binder on at least one side of a support, an outermost layer on the same side of the support as the image forming layer, and a non-photosensitive intermediate layer between the outermost layer and the image forming layer, wherein 50% by weight or more of a binder of the non-photosensitive intermediate layer is formed by a hydrophobic polymer latex, the outermost layer has a mean thickness of from 0.1 ?m to 0.45 ?m, and the non-photosensitive intermediate layer has a variation coefficient of a thickness distribution of 50% or less based on a mean thickness of the non-photosensitive intermediate layer. A photothermographic material, which exhibits reduced image unevenness and excellent image storage stability, is provided.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: October 28, 2008
    Assignee: FUJIFILM Corporation
    Inventor: Keiichi Suzuki
  • Patent number: 7108964
    Abstract: The invention relates to a novel kind of anthranilic acid compound that releases a UG as a function of chemical bond cleavage according to Formula (I): Q-(AAS)-UG where UG is an useful group and is chemically bonded to (AAS); (AAS) is an anthranilic acid switching group; and Q is a group in which the bond to (AAS) is broken so that the -(AAS)-UG fragment subsequently decomposes to the free UG.
    Type: Grant
    Filed: August 5, 2005
    Date of Patent: September 19, 2006
    Assignee: Eastman Kodak Company
    Inventors: Stephen P. Singer, Philip A. Allway, Trevor J. Wear, Louis E. Friedrich, Siu (Lambert) C. Tsoi, Bernard A. Clark, Paul L. Stanley
  • Patent number: 7087366
    Abstract: A photothermographic emulsion is prepared by chemically sensitizing silver halide grains formed by oxidative decomposition of a diphenylphosphine sulfide compound on or around the silver halide grains. This procedure uses a unique sequence of steps and provides increased photographic speed and manufacturing reproducibility.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: August 8, 2006
    Assignee: Eastman Kodak Company
    Inventors: Lilia P. Burleva, Kumars Sakizadeh, David R. Whitcomb, Sharon M. Simpson
  • Patent number: 6280919
    Abstract: The invention provides a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a coupler based on a 1-aryl-3-arylpyrazol-5-one ring and represented by formula I: wherein the substituents are as described in the specification.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: August 28, 2001
    Assignee: Eastman Kodak Company
    Inventors: Wojciech K. Slusarek, Jerrold N. Poslusny, Zheng Z. Wu
  • Patent number: 6156490
    Abstract: Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a coupler based on a 1-aryl-3-arylpyrazol-5-one or a 1-aryl-3-alkylpyrazol-5-one ring and represented by formula I: ##STR1## wherein: X represents an aryl, alkyl, alkylamino, or arylamino group;Y can be carbon or sulfur; in is 1 when Y is carbon and 2 when Y is sulfur;R represents a halogen or an alkyl group; and o is 0 to 4, provided that two or more R substituents may join to form one or more additional rings;Z is either (a) an aryl group represented as Ar.sup.3 Q(n) where Q represents n independently selected substituents bonded to the Ar.sup.3 ring; and n is 0 to 5, provided that two or more Q substituents may join to form one or more additional rings or (b) an alkyl group;OAr.sup.4 is an aryloxy group; andP represents p independently selected substituents bonded to the OAr.sup.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: December 5, 2000
    Assignee: Eastman Kodak Company
    Inventors: Wojciech K. Slusarek, Jerrold N. Poslusny, Xiqiang K. Yang
  • Patent number: 6153369
    Abstract: Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a pyrazol-5-one coupler bearing a 4-aryloxy coupling-off group containing a group capable of releasing a photographically useful group (PUG) wherein:(1) the pyrazol-5-one ring contains a 1-aryl substituent which in turn contains, in a position ortho to the bond linking it to the pyrazolone ring, a secondary carbonamido group or a secondary sulfonamido group;(2) the pyrazol-5-one ring contains either (a) a 3-aryl substituent which in turn contains substituents for which the sum of the Hammett's .sigma. constant values is -0.3 or higher or (b) a 3-alkyl substituent; and(3) the 4-aryloxy coupling-off group:(a) contains ring substituents selected so that the sum of the Hammett's .sigma. constant values for all substituents on the phenoxy ring is at least 0.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 28, 2000
    Assignee: Eastman Kodak Company
    Inventors: Wojciech K. Slusarek, Jerrold N. Poslusny, Xiqiang K. Yang
  • Patent number: 6150078
    Abstract: The invention provides a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith an 1-arylpyrazol-5-one coupler bearing a 4-aryloxy coupling-off group containing a group capable of releasing a photographically useful group (PUG) wherein:(1) the 1-arylpyrazol-5-one ring contains a 3-aryl substituent which in turn contains substituents for which the sum of the Hammett's .sigma. constant values is at least 0, provide that two or more such substituents may join to form one or more additional rings; and(2) the 4-aryloxy coupling-off group:(a) contains ring substituents selected so that the sum of the Hammett's sigma constant values for all substituents on the aryloxy ring is at least 0.
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: November 21, 2000
    Assignee: Eastman Kodak Company
    Inventors: Wojciech K. Slusarek, Jerrold N. Poslusny, Zheng Z. Wu, Xiqiang Yang
  • Patent number: 5981157
    Abstract: A silver halide light-sensitive color photographic material comprising containing a coupler is disclosed.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 9, 1999
    Assignee: Konica Corporation
    Inventors: Shinri Tanaka, Michiko Nagato
  • Patent number: 5912110
    Abstract: A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula ##STR1## wherein COUP is a coupler moiety having a coupling site to which T.sup.1 is attached;T.sup.1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated chain, or by nucleophilic displacement reaction, to release from HETERO;HETERO is a heterocyclic group containing at least two heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein one of the heteroatoms is directly attached to T.sup.1 ;R.sup.1 and R.sup.2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; andPUG is a photographically useful group.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: June 15, 1999
    Assignee: Eastman Kodak Company
    Inventors: William James Begley, Teh Hsuan Chen, Frank Dino Coms, Donald Singleton, Jr.
  • Patent number: 5830627
    Abstract: A silver halide color photographic material is described, which comprises a support having provided thereon a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer, and a red-sensitive silver halide emulsion layer, wherein the photographic material contains at least one compound having a photographically useful compound which is inactivated by the chelation with a metal, and the ratios of the gradients of yellow, magenta and cyan in specific development processing II to the gradients thereof in specific development processing I satisfy the following conditions:0.8.ltoreq..gamma..sub.II (Y)/.gamma..sub.I (Y).ltoreq.1.20.8.ltoreq..gamma..sub.II (M)/.gamma..sub.I (M).ltoreq.1.20.8.ltoreq..gamma..sub.II (C)/.gamma..sub.I (C).ltoreq.1.2wherein .gamma..sub.I (Y), .gamma..sub.I (M) and .gamma..sub.I (C) each represents the gradient of yellow, magenta or cyan when the development processing I is carried out and .gamma..sub.II (Y), .gamma..sub.II (M) and .gamma..sub.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: November 3, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasufumi Nakai, Jiro Tsukahara, Toshio Kawagishi
  • Patent number: 5827637
    Abstract: A silver halide light-sensitive material is disclosed, comprising a compound represented by the following formula (1): ##STR1## wherein PUG represents a photographically useful group bonded to B through a hetero atom thereof, CHL represents a multidentate ligand capable of coordinating to a metal atom, B represents a block group of which bonding to PUG is cleaved on cleavage of the bonding of CHL--M, M represents a divalent or greater metal, L represents a chelating ligand, m represents an integer of from 1 to 3, n represents 0 or an integer of 1 or 2, and the sum of m and n does not exceed 3. Also disclosed is an image formation method using the above-described silver halide light-sensitive material.
    Type: Grant
    Filed: March 19, 1997
    Date of Patent: October 27, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Osamu Uchida, Jiro Tsukahara, Toshio Kawagishi, Hideaki Satoh, Yasufumi Nakai
  • Patent number: 5827638
    Abstract: A silver halide photographic light-sensitive material is described, which comprises a support having provided thereon a light-sensitive silver halide emulsion layer, wherein the silver halide photographic material contains a compound having been blocked by a metal chelate and capable of releasing a photographically useful compound therefrom through a reaction of the metal chelate moiety with a water-soluble chelating agent capable of forming a metal chelate having a higher stability constant on development. A method for forming an image is also described, which comprises processing, after imagewise exposure, a silver halide photographic light-sensitive material with a processing solution containing a nitrogen-containing heterocyclic carboxylic acid-base chelating agent.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: October 27, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Jiro Tsukahara, Hideaki Satoh, Osamu Uchida, Toshio Kawagishi, Yasufumi Nakai
  • Patent number: 5686234
    Abstract: A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formulaCOUP--T.sup.1 --T.sup.2 --(T.sup.3).sub.b --PUGwhereinCOUP is a coupler moiety having a coupling site to which T.sup.1 is attached;T.sup.1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated or unconjugated chain, or by nucleophilic displacement reaction, to release T.sup.2, T.sup.2 being an indazole timing or linking group which, after release from T.sup.1, functions by electron transfer down a conjugated chain to release T.sup.3 or PUG, and which is represented by the formula: ##STR1## wherein ** denotes the point of attachment to T.sup.1 and *** denotes the point of attachment to T.sup.3 or PUG;R.sup.1 and R.sup.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: November 11, 1997
    Assignee: Eastman Kodak Company
    Inventors: William James Begley, Teh Hsuan Chen, Donald Singleton, Jr., Frank Dino Coms
  • Patent number: 5670301
    Abstract: A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the layer containing a photographic coupler represented by the formula ##STR1## wherein COUP is a coupler moiety having a coupling site to which T.sup.1 is attached;T.sup.1 is a timing or linking group which releases from COUP during processing and which functions by electron transfer down a conjugated chain, or by nucleophilic displacement reaction, to release from HETERO;HETERO is a heterocyclic group containing at least two heteroatoms independently selected from oxygen, nitrogen, or sulfur, wherein one of the heteroatoms is directly attached to T.sup.1 ;R.sup.1 and R.sup.2 are independently selected from hydrogen, or an aliphatic, carbocyclic, or heterocyclic group, or may be bonded together to form a 5, 6, or 7 membered ring; andPUG is a photographically useful group.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: September 23, 1997
    Assignee: Eastman Kodak Company
    Inventors: William James Begley, Teh Hsuan Chen, Frank Dino Coms, Donald Singleton, Jr.
  • Patent number: 5536627
    Abstract: A photographic element comprising a support having a front side and a back side, an image forming layer on the front side of the support, a protective overcoat on the front side of the Support further removed from the support than the image forming layer, the protective overcoat comprising process surviving matte particles in a hydrophilic binder, the matte particles having a Rockwell hardness of less than M90, the back side of the support having a protective overcoat layer, the protective overcoat layer being the layer furthest removed from the back side of the support and comprising a hydrophobic material having a Delta haze less than 30%.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: July 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: Yongcai Wang, Alfred B. Fant, Dennis E. Smith
  • Patent number: 5529894
    Abstract: Disclosed is a silver halide color photographic material which comprises a support having thereon at least one photosensitive silver halide emulsion layer, a pyrazoloazole based magenta coupler, and a coupler which contains a plurality of photographically useful groups or precursors thereof. The photograhically useful groups or precursors thereof are capable of being released when the coupler undergoes a coupling reaction with the oxidized product of a color developing agnet.
    Type: Grant
    Filed: March 9, 1994
    Date of Patent: June 25, 1996
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keiji Mihayashi, Atsuhiro Ohkawa
  • Patent number: 5447833
    Abstract: A silver halide photographic material having on a support at least one silver halide emulsion layer, which contains at least one precursor of the kind which releases at least two groups selected from the group consisting of a photographically useful group and a precursor thereof via a timing group, wherein plural photographically useful groups or precursors thereof are present on different constituent atoms of said timing group, provided that when the plural photographically useful groups have different functions, the timing group is a group which does not utilize an intramolecular nucleophilic substitution reaction.
    Type: Grant
    Filed: April 28, 1994
    Date of Patent: September 5, 1995
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masuji Motoki, Atsuhiro Ohkawa, Keiji Mihayashi
  • Patent number: 5256529
    Abstract: A magenta dye-forming pyrazolotriazole coupler solubilized by one or two sulfonamido groups results in a coupler having increased coupling activity, low fog and good dispersability. The couplers are useful in photographic elements and react with oxidized silver halide to form dyes, and/or to release photographically useful groups.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: October 26, 1993
    Assignee: Eastman Kodak Company
    Inventors: Robert F. Romanet, Hans G. Ling, David Hoke
  • Patent number: 5019492
    Abstract: A novel blocked photographically useful compound comprises a new blocking group that (a) comprises two electrophilic groups, the least electrophilic of which is bonded directly or through a timing group to the photographically useful group (PUG) of the compound, (b) is capable of reacting with a dinucleophile reagent, and (c) has the two electrophilic groups separated from each other by a bond or unsubstituted or substituted atom that enables nucleophilic displacement to occur with release of PUG when the compound is reacted with a dinucleophile reagent. Such a blocked photographically useful compound is useful in a photographic material and process to provide increased stability and enable more rapid release of the photographically useful group upon reaction with a dinucleophile reagent.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: May 28, 1991
    Assignee: Eastman Kodak Company
    Inventors: John M. Buchanan, Ewell R. Cook, Jared B. Mooberry, Gary S. Proehl, Stephen P. Singer, William N. Washburn
  • Patent number: 4983494
    Abstract: An image is formed in a photographic element by a process comprising a step of heating a heat-developable photosensitive material in the presence of a specific compound which typically releases a phenylmercaptotetrazole having a substituted benzene ring and serving as a development retarder.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: January 8, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kitaguchi, Masatoshi Kato
  • Patent number: 4888268
    Abstract: A silver halide photographic material, which contains at least one blocked photographic reagent having in the molecule thereof at least one group selected from ##STR1## group and capable of releasing a photographically useful reagent by cleavage of the --N--C--bond by a nucleophilic attack of a nucleophilic reagent on the carbonyl group and a subsequent intramolecular electron transfer reaction or intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer, is photographically processed in the presence of an amine. A photographic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer is provided along with a method of processing the photographic material.
    Type: Grant
    Filed: August 16, 1988
    Date of Patent: December 19, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Mitsunori Ono, Yoshio Inagaki
  • Patent number: 4845018
    Abstract: An image-forming process involving a heating step is disclosed, which comprises conducting the heating in the presence of a compound represented by the following general formula (I): ##STR1## wherein: R.sup.1 and R.sup.2, which may be the same or different, each represents a group selected from an aryl group, a substituted aryl group, a heterocyclic group, and a substituted heterocyclic group;R.sup.3 represents a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, a substituted cycloalkyl group, an aralkyl group, a substituted aralkyl group, or a group selected from those which are referred to with respect to R.sup.1 and R.sup.2 ;R.sup.1, R.sup.2, and R.sup.3 may form a ring structure via a hydrocarbon chain, a hetero atom-containing hydrocarbon chain or a hetero atom, or may be directly bound to each other to form a ring structure; andPUG represents a photographically useful group.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: July 4, 1989
    Assignee: Fuji Photo Film, Co., Ltd.
    Inventors: Kozo Sato, Hiroshi Kitaguchi, Masashi Takeuchi, Masaaki Tsukase, Masatoshi Kato
  • Patent number: 4845020
    Abstract: A method of processing a silver halide photographic material comprising processing the silver halide photographic material in the presence of an antifoggant which is an organic compound which loses its developing restraining function by a reduction oxidation reaction with oxidized developers. The method improves the discrimination between image and non-image areas of the silver halide photographic material by the novel antifoggant which restrains fog selectively in non-image areas without decreasing photographic sensitivity and image density. The organic compound can be an anti-foggant which possesses a moiety according to the Kendall-Pelz rule and either a mercapto group or a cyclic NH group.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: July 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Keiji Mihayashi
  • Patent number: 4824759
    Abstract: A method for forming an image, which comprises heating a light-sensitive material in the presence of a compound capable of forming a 2-mercaptobenzazole ring by a ring closing reaction when heated.In accordance with the method of the present invention, development is stopped at an appropriate time of development whereby an image having a high maximum density and low fog is obtained.A heat-developable light-sensitive material containing the compound is also disclosed.
    Type: Grant
    Filed: February 7, 1986
    Date of Patent: April 25, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kozo Sato, Hiroshi Kitaguchi, Masashi Takeuchi, Masaaki Tsukase, Masatoshi Kato
  • Patent number: 4822724
    Abstract: In a reversal process for the formation of color photographic images which consists of a black and white development (first development) to obtain a first negative image, followed by exposure and/or uniform fogging of the residual silver halide and a further processing (including a second color development), to obtain a second visible (in transparency) color positive image, of a silver halide color multilayer material which comprises, coated on a support base, one or more red-sensitive silver halide emulsion layers associated with dispersed non-diffusing hydrophobic cyan couplers, one or more green-sensitive silver halide emulsion layers associated with dispersed non-diffusing hydrophobic magenta couplers and one or more blue-sensitive silver halide emulsion layers associated with dispersed non-diffusing hydrophobic yellow couplers, the improvement which consists of the reversal development of said magenta-forming layer being performed in the absence of a significant presence of oil.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: April 18, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Agostino Baldassarri, Marco Loiacano, Giuseppe Loviglio
  • Patent number: 4801522
    Abstract: Process for preparing a photographic emulsion containing tabular silver halide grains, which exhibit high speed upon sensitization, having a thickness of about 0.05 to 0.5 .mu.m, average grain volume of about 0.05 to 1.0 .mu.m.sup.3 and mean aspect ratio of greater than 2:1 comprisingA. adding silver nitrate to a vessel containing dispersing medium/bromide mixture, initial bromide ion concentration 0.08 to 0.25 N, to form tabular seed grains;B. adding an ammoniacal base solution, to achieve 0.002 to 0.2 normal of the base (e.g., after at least 2% of total silver nitrate has been added); andC. adding additional silver nitrate and halide, e.g., Br.sup.- or BrI.sup.-, by balanced double jet procedure. The emulsions are used in photographic elements for x-ray, graphic arts, etc.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: January 31, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Charles D. Ellis
  • Patent number: 4791049
    Abstract: A silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer, wherein the silver halide photographic material contains at least one compound represented by the following general formula (I):A--Time).sub.t X (I)wherein A represents an oxidation reduction moiety comprising an atomic group which does not enable --Time).sub.t X to be released until the oxidation reduction moiety is oxidized during photographic development processing; Time represents a timing group which is connected to A through a sulfur atom, a nitrogen atom or an oxygen atom; t represents an integer of 0 or 1; and X represents a group represented by the following general formula (II): ##STR1## wherein R represents a straight chain or branched chain alkylene group, a straight chain or branched chain alkenylene group, a straight chain or branched chain aralkylene group or an arylene group; Z represents a polar substituent; Y represents ##STR2## R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: December 13, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetsuro Kojima, Shigeo Hirano, Hideo Usui
  • Patent number: 4775610
    Abstract: A method for the formation of a photographic image including a heating step, comprising heating a photographic material in the presence of at least one compound selected from those represented by formulae (I) and(II) ##STR1## wherein A represents a non-metallic atomic group forming a carbocyclic aromatic ring or a heterocyclic aromatic ring;X represents a nucleophilic group or a precursor thereof;Q represnts a hydrogen atom or a substituted or unsubstituted alkyl, cycloalkyl, or aryl group; andPUG represents a photographically useful group.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: October 4, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kitaguchi, Kozo Sato, Masatoshi Kato
  • Patent number: 4772537
    Abstract: A silver halide photographic material which contains at least one blocked photographic reagent having in the molecule thereof at least one ##STR1## structure and capable of releasing a photogrpahically useful reagent by cleavage of the ##STR2## bond by a nucleophilic attack of a nucleophilic reagent on the structure and a subsequent intramolecular electron transfer reaction or an intramolecular nucleophilic reaction and which has at least one photosensitive silver halide emulsion layer. There is provided a photogrphic material which includes, in combination, a photographic reagent precursor capable of releasing a photographically useful reagent timely on photographic processing and a photosensitive silver halide emulsion layer.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: September 20, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Mitsunori Ono
  • Patent number: 4770990
    Abstract: A silver halide photographic material is disclosed. The material comprises a support and at least one silver halide emulsion layer formed thereon, in which said emulsion layer or other layer contains a compound represented by formula (I) ##STR1## wherein X represents an atomic group capable of releasing (Time).sub.t PUG by undergoing an oxidation-reduction reaction with CA.dbd.CR.sub.1 --CR.sub.2).sub.n C.sub.B ; C.sub.A and C.sub.B each represents a carbon atom; n represents an integer of 0, 1, 2, or 3; R.sub.1 and R.sub.2 each a hydrogen atom or a group substitutable for a hydrogen atom; EWG represents an electron withdrawing group having a Hammett's .sigma. para value greater than 0.3; --Time).sub.t PUG represents a group bonded to C.sub.B through an oxygen atom thereof; Time represents a timing group; t represents 0 or 1; and PUG represents a photographically useful group.
    Type: Grant
    Filed: April 14, 1986
    Date of Patent: September 13, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koki Nakamura, Shigeo Hirano, Osamu Takahashi
  • Patent number: 4729936
    Abstract: An image forming process including a heating step is disclosed. The process comprises conducting said heating step in the presence of at least one compound represented by formula (I), (II), or (III). ##STR1## wherein R.sup.1 represents ##STR2## wherein R.sup.11 and R.sup.12 each represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heterocyclic group, a substituted or unsubstituted alkyloxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthio group, a substituted or unsubstituted arylthio group or a substituted or unsubstituted amino group; R.sup.11 and R.sup.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: March 8, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kitaguchi, Kozo Sato, Masatoshi Kato
  • Patent number: 4708927
    Abstract: A novel photographic element is disclosed. The element comprises a light-sensitive element including a light-sensitive silver halide emulsion layer coated on a support, wherein said silver halide emulsion layer or other photographic layers contain at least one development inhibitor precursor represented by formula (I) ##STR1## wherein A represents a phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring group; L represents a chemical bond or divalent linking group; p and q each represents an integer of 1 or 2; and n represents 0 or 1.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: November 24, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Okamura, Hiroshi Kawamoto, Yoshio Sakakibara
  • Patent number: 4696887
    Abstract: A novel method for formation of an image comprising a heating step, comprising the heating carried out in the presence of a compound of general formula (I):X--SO.sub.2 (DI) (I)wherein X represents a reducing group capable of reducing a silver salt and capable of being oxidized by heating and in its oxidized state capable of releasing a compound represented by (DI)--SO.sub.2 NH.sub.2 by reaction with a nucleophilic agent; and (DI) represents a development inhibiting group capable of inhibiting the oxidation reduction reaction of the silver salt and a reducing aent.The compound of the formula (I) functions to inhibit development after a certain period of time from the beginning of heat development.The present method provides a stable image with reduced fog and image mottle.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: September 29, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kozo Sato, Hiroshi Kitaguchi, Masashi Takeuchi, Masaaki Tsukase, Masatoshi Kato
  • Patent number: 4678735
    Abstract: A heat developable light-sensitive material containing a compound represented by general formula (I) described below in a light-sensitive layer or an image receiving layer thereof: ##STR1## wherein X represents an atomic group necessary to complete a benzene ring or a naphthalene ring; R represents a group convertible to a hydroxy group or a dissociation form thereof at the time of heat development; Y represents an atomic group necessary to complete a 5-membered or 6-membered heterocyclic group containing at least one nitrogen atom; Q represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group; TIME represents a timing group; and n represents 0 or a positive integer.
    Type: Grant
    Filed: September 10, 1985
    Date of Patent: July 7, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Kitaguchi, Masatoshi Kato, Kozo Sato, Masasi Takeuchi, Masaaki Tsukase
  • Patent number: 4659651
    Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer having associated therewith at least one blocked photographic reagent represented by formula (I) or (II); ##STR1## wherein, A represents a moiety of a photographic reagent or a moiety of a precursor of a photographic reagent bonded to the ring containing Z through a hetero atom; Y.sup.1, and Y.sup.2 and Y.sup.3 each represents a hydrogen atom or a substituent, or Y.sup.1 and Y.sup.3 in formula (I) together form a ring; Z represents an atomic group necessary for forming a carbon ring or a heterocyclic ring; and n represents 1 or 2.The silver halide photographic material is stable under storage conditions.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: April 21, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Morio Yagihara, Akihiko Ikegawa
  • Patent number: 4629683
    Abstract: A method of processing a photographic material which contains a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent capable of releasing a photographically useful agent by ring cleavage of a 4- to 7-membered ring containing at least one carbonyl group in the presence of a hydroxylamine, whereby both high stability of the photographic material upon storage and timely release of the photographically useful agent upon processing are achieved.
    Type: Grant
    Filed: April 20, 1984
    Date of Patent: December 16, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Mitsunori Ono, Keiji Mihayashi, Seiji Ichijima, Hidetoshi Kobayashi
  • Patent number: 4584257
    Abstract: A photographic element comprised of a support having provided thereon at least one silver halide emulsion layer, the element containing a development inhibitor precursor, is disclosed. The development inhibitor precursor is a compound represented by following general formula (I): ##STR1## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; Q represents a naphthalene skeleton; R.sup.1, R.sup.2, and R.sup.3, which may be the same or different, independently represent a hydrogen atom or a monovalent substituent; and n represents 1 or 2. The photographic element gives improved image quality particularly in the low Dmin area. The element can be processed over a wide range of different processing temperatures and has improved preservability.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: April 22, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Okamura, Yoshio Sakakibara
  • Patent number: 4562138
    Abstract: This invention relates to nitrogen containing heterocyclic compounds represented by the general formula ##STR1## wherein Z is non-metallic atoms necessary to form a tetrazole, a benzotriazole or a benzothiazole, either substituted or unsubstituted, n is either 1 or 2 and R is alkyl or phenyl. The above mentioned compounds can be suitably used in a photographic material as a development inhibitor precursor.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: December 31, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Morito Uemura, Kaoru Onodera
  • Patent number: 4554243
    Abstract: A silver halide photographic light-sensitive material is described which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material therein contains a blocked photographic agent capable of releasing a photographically useful agent and the blocked photographic agent has a carbonyl group or thiocarbonyl group to which a hydrogen atom or a carbon atom is directly bonded and is substituted with a photographically useful group which is capable of being released upon an intramolecular nucleophilic attack by the oxygen atom in the carbonyl group or the sulfur atom in the thiocarbonyl group.The precursor of photographic agent is completely stable during storage prior to use of the photographic light-sensitive material, and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material. The precursor also exhibits its function to a substantial degree in a relatively low pH range.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: November 19, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Ono, Isamu Itoh
  • Patent number: 4522917
    Abstract: A photographic silver halide light-sensitive material is disclosed. The material is comprised of a support and a photographic layer or layers on the support. The photographic layer contains at least one of the compounds represented by the general formula: A--OCH.sub.2 --Z (wherein A is a group capable of undergoing cleavage on application of alkali hydrolysis, and Z is a photographically useful group containing a nitrogen atom through which it is linked to the group A--OCH.sub.2 --). The compounds, i.e., photographically useful group precursors, as used herein are stable during the storage of the raw film and can release the photographically useful group at a controlled speed during development.
    Type: Grant
    Filed: November 18, 1983
    Date of Patent: June 11, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seiji Ichijima, Keiji Mihayashi, Isamu Itoh
  • Patent number: 4518685
    Abstract: A silver halide photographic light-sensitive material which comprises a support having thereon a light-sensitive silver halide emulsion layer, wherein the photographic light-sensitive material contains a blocked photographic agent therein represented by formula (I): ##STR1## wherein A represents a photographic agent moiety which is bonded to a blocking moiety through a hetero atom or a group which is bonded to a blocking moiety through a hetero atom and capable of releasing a photographic agent upon a subsequent reaction after the group is released; Y represents a hydrogen atom or a substituent; and Z represents an atomic group necessary to form a carbocyclic ring or a heterocyclic ring.The precursor of photographic agent is completely stable during the preservation of the photographic light-sensitive material and releases a photographic agent at a desired time upon the processing of the photographic light-sensitive material.
    Type: Grant
    Filed: April 17, 1984
    Date of Patent: May 21, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Morio Yagihara, Akihiko Ikegawa, Mitsunori Ono, Yuji Mihara
  • Patent number: 4511644
    Abstract: A photographic element comprised of a support having provided thereon at least one silver halide emulsion layer, the element containing a development inhibitor precursor. The development inhibitor precursor is represented by the following general formula (I): ##STR1## wherein A represents an unsubstituted or substituted phenyl group or a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R.sup.1 represents a hydrogen atom or a monovalent substituent; and R.sup.2 represents an organic ballasting group. The element is capable of providing color images having improved image quality particularly with respect to having a low density in the Dmin areas. The photographic element can be processed over a wide range of processing temperatures. Further, the element can be preserved for long periods of time without having a reduction in the density in the Dmax areas.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: April 16, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Okamura, Shinji Sakaguchi, Osamu Takahashi, Ashita Murai
  • Patent number: 4503139
    Abstract: There are described novel photographic products and processes which utilize compounds which release a photographic reagent in the presence of alkali. The compounds include an imidazole blocking group and cleave in alkali to release the photographic reagent. Also described are novel compounds.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: March 5, 1985
    Assignee: Polaroid Corporation
    Inventors: James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick, Nancy M. Sofen
  • Patent number: 4500636
    Abstract: A silver halide photographic light-sensitive material which comprises a light-sensitive silver halide emulsion layer having associated therewith a blocked photographic agent, said blocked photographic agent being represented by the following general formula (I): ##STR1## wherein A represents a photographic agent moiety which is attached to a blocking moiety through a hetero atom; Z represents a divalent linkage group; p represents 0 or 1; X and Y each represents a substituent: m represents an integer of 0 to 4: and n represents an integer of 0 to 5.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: February 19, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsunori Ono, Isamu Itoh, Keiji Mihayashi, Yukio Karino
  • Patent number: 4482629
    Abstract: There is disclosed a light-sensitive silver halide photographic material containing a compound represented by the formula (I): ##STR1## wherein G, R.sub.1, R.sub.2 and X have the same meanings as defined in the specification.The 1-naphthol coupler which is contained in the light-sensitive silver halide photographic material is high in reactivity with an oxidized product of a color forming developing agent and can efficiently impart imagewise photographic effects to light-sensitive silver halide photographic materials.
    Type: Grant
    Filed: March 16, 1983
    Date of Patent: November 13, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Satoshi Nakagawa, Hiroshi Sugita, Shuzi Kida, Morito Uemura, Ken-ichi Kishi
  • Patent number: 4472493
    Abstract: A photographic element is disclosed which is comprised of a support having thereon a light-sensitive silver halide emulsion which is associated with a development inhibitor precursor. The precursor is represented by the general formula [I] ##STR1## the substituents within the general formula are defined within the specification. By utilizing the development inhibitor precursor of the invention the resulting photographic element provides images having high quality and excellent processing temperature characteristics.
    Type: Grant
    Filed: December 9, 1983
    Date of Patent: September 18, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hisashi Okamura, Yukio Maekawa, Yukio Karino
  • Patent number: 4450223
    Abstract: A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula: ##STR1## wherein: R.sup.10 and R.sup.20 (same or different)(1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form,(2) represent an aryl group including a substituted aryl group, or(3) represent a heterocyclic ring residue including such residue in substituted form, orR.sup.10 and R.sup.20 are ringclosed, either R.sup.10 or R.sup.20 containing a ballasting group conferring diffusion resistance to the compound in hydrophilic colloid media when penetrated by an aqueous alkaline liquid;L.sup.1 and L.sup.2 (same or different) represent a ##STR2## --SO.sub.
    Type: Grant
    Filed: February 14, 1983
    Date of Patent: May 22, 1984
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Raphael K. Van Poucke, Christian C. Van de Sande, Andree Verhecken
  • Patent number: 4410618
    Abstract: .alpha.-Ketoimidomethyl blocked photographic reagents are useful in photographic elements, film units and processes. The blocked photographic reagents have the structure: ##STR1## wherein J represents ##STR2## X represents the atoms to complete a 5- or 6-membered ring or ring system; R represents alkyl of 1 to 30 carbon atoms or aryl of 6 to 30 carbon atoms; andPR represents the residue of an organic photographic reagent containing a heteroatom through which it is joined to the blocking group.
    Type: Grant
    Filed: June 11, 1982
    Date of Patent: October 18, 1983
    Assignee: Eastman Kodak Company
    Inventors: James P. Vanmeter, Chin H. Chen
  • Patent number: 4390613
    Abstract: There is disclosed a diffusion transfer photographic system wherein development of an exposed photosensitive element with an aqueous alkaline processing composition is effected in the presence of a compound represented by the formula ##STR1## wherein X represents the nonmetallic atoms necessary to form a nucleus which completes a 5- or 6-membered heterocyclic moiety on said structure including substituted rings and fused rings; R is H, an alkali metal or a group which is cleavable in a photographic aqueous alkaline processing composition; and R.sub.1 is either a group which has a pKa of from about 7 to about 14 which is ionizable to an anion whereby the silver salt of the mercaptan (resulting from cleavage or ionization of --SR) is rendered more soluble in the pH range within which R.sub.1 is ionized to an anion than it is below that pH range, or a precursor of such a group.
    Type: Grant
    Filed: January 5, 1981
    Date of Patent: June 28, 1983
    Assignee: Polaroid Corporation
    Inventors: Avinash C. Mehta, George H. Nawn, Lloyd D. Taylor
  • Patent number: H817
    Abstract: A photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer, wherein said light-sensitive material contains:(1) a compound represented by formula (I):PWR--Time--.sub.t PUG (I)wherein PWR represents a group capable of releasing (Time--.sub.t PUG upon being reduced; PUG represents a photographically useful group; Time represents a group capable of releasing PUG through a reaction subsequent to the release from PWR in the form of --Time--.sub.t PUG; and t represents 0 or 1, and(2) a polymer comprising at least 10 repeating units derived from the same monomer and having a molecular weight of 1000 or more. The photographic light-sensitive material exhibits both high activity of a compound capable of releasing a photographically useful group during development processing and preservation stability before development processing.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: September 4, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaharu Toriuchi, Keizo Koya