Blocked Developers Patents (Class 430/959)
  • Patent number: 4537853
    Abstract: Photographic silver halide material containing a ballasted electron-donor precursor compound yielding by alkaline hydrolysis an electron-donor compound (ED-compound) capable (1) of donating electrons to an oxidized electron-accepting silver halide developing agent e.g. for scavenging it, said electron-donor precursor compound corresponding to the following general formula: ##STR1## wherein: R represents hydrogen or a substituent, e.g. an acyl group, which on hydrolytic removal allows the replacement of R by H,R.sup.1, R.sup.2 and R.sup.3 (same or different) are hydrocarbon substituents or R.sup.3 is H, andZ and Y represent the necessary atoms to close a benzene ring that may be substituted or form a fused ring system.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: August 27, 1985
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Christian C. Van de Sande, Andre Verhecken, Wilhelmus Janssens
  • 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: 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: 4499181
    Abstract: A photographic recording material. On a support are provided a silver emulsion halide layer and a photographic layer. The photographic layer contains an indole compound represented by the general formula (I): ##STR1## wherein PUG represents a photographically useful group, Ball represents an organic group which has enough molecular weight and/or disposition to render the compound non-diffusible during processing of the photographic recording material with an alkaline medium and wherein the Ball contains a nitrogen atom which is directly attached to the 5th or 6th position of the indole ring. R.sub.1 represents a halogen atom or a monovalent organic group. R.sub.2 represents a hydrogen atom or a low molecular group attached, through a carbon atom, to the 2nd position of the indole ring. "m" represents an integer of zero to 3.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: February 12, 1985
    Assignee: Konishiroku Photo Ind., Co., Ltd.
    Inventors: Kazumasa Watanabe, Hidetaka Deguchi, Shunji Suginaka
  • Patent number: 4493888
    Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one organic metal complex represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein M represents a divalent metal atom; R.sup.1 and R.sup.2, which may be the same or different, each represents an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms, or R.sup.1 and R.sup.2 may be bonded each other to form a heterocyclic ring together with the nitrogen atom; R.sup.3, represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; and R.sup.4 and R.sup.
    Type: Grant
    Filed: July 15, 1983
    Date of Patent: January 15, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Katsusuke Endo, Eiichi Kato, Nobutaka Ohki, Takatoshi Ishikawa
  • Patent number: 4483919
    Abstract: A silver halide photographic light-sensitive material containing at least one compound represented by the general formula (I): ##STR1## is disclosed. The compound of the invention has good stability over time. The material has improved developability and makes it possible to carry out simple and rapid processing. The material has good resistance with respect to fogging, stains and desensitization.
    Type: Grant
    Filed: December 23, 1983
    Date of Patent: November 20, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hidetoshi Kobayashi, Isamu Itoh, Yasuhiro Yoshioka, Keiji Mihayashi, Noriyuki Inoue
  • Patent number: 4473635
    Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## Wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a hydrogen atom or an alkyl group having from 1 to 10 carbon atoms, or R.sub.1 and R.sub.2 may be bonded to each other to form a heterocyclic ring together with the nitrogen atom; R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which may be the same or different, each represents a hydrogen atom, a halogen atom, a hydroxy group, an amino group, an alkoxy group, an acylamido group, a sulfonamido group, an alkylsulfonamido group or an alkyl group, or R.sub.1 and R.sub.6 or R.sub.2 and R.sub.3 may be bonded to each other to form a 5-membered or 6-membered ring; X represents HPF.sub.6 or HBF.sub.4 ; and n represents an integer from 1 to 3.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: September 25, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takatoshi Ishikawa, Katsusuke Endo, Sigeru Kuwazima, Eiichi Kato, Nobutaka Ohki
  • Patent number: 4446216
    Abstract: Photographic material which comprises in at least one silver halide emulsion layer or a layer or layers adjacent thereto at least one substituted hydroquinone compound of the formula ##STR1## where R is hydrogen or optionally substituted alkyl, aryl or a heterocyclic group, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each hydrogen, halogen or optionally substituted alkyl,x is 0 or 1,y is 0 or 1,and R.sub.1 is hydrogen or a group of the formula ##STR2## where R, x and y are as just defined.
    Type: Grant
    Filed: November 23, 1982
    Date of Patent: May 1, 1984
    Inventors: Norman A. Smith, Stephen R. Postle, William E. Long
  • Patent number: 4439519
    Abstract: A silver halide photographic light-sensitive material containing a diffusion resistant coupler, a light-sensitive silver halide and at least one compound represented by the following general formula (I) in the same layer or different layers on a support. ##STR1## wherein R.sup.1 and R.sup.2 independently represent an alkyl group having from 1 to 5 carbon atoms, a hydroxyalkyl group having from 1 to 5 carbon atoms, an alkoxyalkyl group having from 2 to 10 carbon atoms or an alkylsulfonamidoalkyl group having from 2 to 10 carbon atoms; R.sup.3 represents a hydrogen atom, an alkyl group having from 1 to 5 carbon atoms or an alkoxy group having from 1 to 5 carbon atoms; X represents a hydrogen atom or a group capable of being removed with alkali; Y represents ##STR2## and Z represents an alkyl group, an alkenyl group, an aryl group or a heterocyclic group.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: March 27, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobutaka Ohki, Ken Kawata, Isamu Itoh
  • Patent number: 4436810
    Abstract: Compounds corresponding to the formula: ##STR1## wherein Z represents a radical which completes a condensed aromatic ring system;R.sup.1 represents an n-valent aliphatic or aromatic radical;R.sup.2 represents H, alkyl or aryl,R.sup.3 represents one or more radicals to control the diffusion properties and the activation pH;andn represents 1 or 2,are suitable ED precursor compounds for use in color-photographic recording materials. They are preferably used in a combination with reducible dye-releasers. They are also suitable as so-called scavengers.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: March 13, 1984
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Karl Kuffner, Paul Marx, Wolfgang Lassig
  • Patent number: 4426444
    Abstract: Compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are hydrogen or alkyl, X represents the atoms to complete an aromatic heterocyclic ring system and Y is hydrogen or the group ##STR2## where X is defined as above, are readily cleaved in alkaline solutions to release a hydroquinone derivative.The compounds can be incorporated into photographic materials used for activation processing.
    Type: Grant
    Filed: September 17, 1982
    Date of Patent: January 17, 1984
    Assignee: Ciba Geigy AG
    Inventors: Stephen R. Postle, Patrick D. P. Thomas
  • Patent number: 4420557
    Abstract: Compounds corresponding to the formula: ##STR1## wherein R.sup.1 represents an aromatic group, andR.sup.2 represents H, alkyl, alkenyl, aryl or acyl, are suitable ED precursor compounds for use in color photographic recording materials. They are preferably used in combination with reducible dye releasers. They are also suitable as so-called scavengers.
    Type: Grant
    Filed: October 25, 1982
    Date of Patent: December 13, 1983
    Assignee: Agfa-Gevaert Aktiengesellschaft
    Inventors: Heinrich Odenwalder, Paul Marx
  • 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: 4407941
    Abstract: A photographic element comprising a support provided thereon with at least one light-sensitive silver halide emulsion layer containing a nondiffusible compound which receives at least one electron in an alkaline condition to release a photographically useful material and a nondiffusible electron donor or a precursor thereof having the following formula (I) or (II): ##STR1## wherein R.sup.1 represents hydrogen, an alkyl, an aryl or a heterocyclic group, R.sup.2 represents hydrogen, an alkyl, an aryl, a heterocyclic, an amino, a carbamide, a sulfonamide, a sulfamoyl, a carbamoyl or a ureido group, R.sup.3 and R.sup.4 each is hydrogen, --COR.sup.5, --SO.sub.2 R.sup.6 or --CSR.sup.7 wherein R.sup.5 and R.sup.6 each is a substituted or unsubstituted, respectively, alkyl, alkenyl, aryl, heterocyclic, alkylamino, alkyloxy, aryloxy, alkylthio, arylthio, alkyloxycarbonyl or aryloxycarbonyl group, and R.sup.7 is a substituted or unsubstituted alkyllamino or arylamino group, said R.sup.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: October 4, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shunji Suginaka, Ryuichiro Kobayashi, Satoru Ikeuchi, Noboru Mizukura, Noriko Fujita
  • Patent number: 4358532
    Abstract: A photographic element containing a compound represented by formula (I) ##STR1## wherein G represents --OR.sup.1 or --NHR.sup.2, R.sup.1 represents hydrogen or a hydrolyzable moiety, R.sup.2 represents hydrogen or an alkyl group containing from 1 to 50 carbon atoms, Z represents a photographically useful group, A represents an atomic group forming an aromatic ring, Ball represents an organic immobilizing group on the aromatic ring, which cntains from 8 to 50 carbon atoms, m represents an integer of 1 or 2, X represents a divalent organic group, Nu represents a nucleophilic group, and n represents an integer of 1 or 2, and X with the nucleophilic group Nu is capable of forming a 5- to 12-membered ring by oxidation having an electrophilic center at the carbon atom substituted by the --NHSO.sub.2 Z group.
    Type: Grant
    Filed: July 15, 1981
    Date of Patent: November 9, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Koichi Koyama, Shinsaku Fujita
  • Patent number: 4358525
    Abstract: Photographically useful compounds such as photographic reagents and photographic dyes are blocked with a grouping which, under alkaline conditions, is cleaved from the compound by an intramolecular nucleophilic displacement reaction. The compounds are resistant to unblocking under storage conditions, but are uniformly unblocked under conditions encountered during photographic processing.
    Type: Grant
    Filed: August 12, 1981
    Date of Patent: November 9, 1982
    Assignee: Eastman Kodak Company
    Inventors: Jared B. Mooberry, William C. Archie, Jr.
  • Patent number: 4340664
    Abstract: Latexes suited for homogeneously incorporating compounds with a photographically useful group into photographic silver halide emulsion materials. The latex incorporates a copolymer comprising recurring units of a monomer with photographically useful group, and recurring units of surface active monomer, according to the general formula: ##STR1## wherein: R.sup.1 is hydrogen or methyl,n is 0 or 1 to 20,L is ##STR2## R.sup.2 is hydrogen or a hydrocarbon group, R.sup.3 is a monovalent chemical bond or a bivalent aliphatic hydrocarbon group or such group interrupted by the group --COO-- or --CONR--, andY is a sulpho, sulphato or phosphono group in acid or salt form, and at least one of the groups --(CH.sub.2).sub.n --, R.sup.2 and R.sup.3 is or comprises a hydrocarbon chain of at least 8 C-atoms.
    Type: Grant
    Filed: September 19, 1980
    Date of Patent: July 20, 1982
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Marcel J. Monbaliu, Walter F. De Winter, Raphael K. Van Poucke
  • Patent number: 4332878
    Abstract: A photographic image-forming method comprising imagewise exposing a silver halide photographic light-sensitive element containing a specific hydroquinone derivative in the silver halide emulsion layer of substantially the surface latent image type or at least one hydrophilic colloid layer thereof and then developing the exposed light-sensitive element in the presence of a specific hydrazine compound. The method forms a photographic image having markedly high negative gradation.
    Type: Grant
    Filed: April 30, 1981
    Date of Patent: June 1, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshitaka Akimura, Shigeo Hirano, Hiroyuki Mifune, Eiichi Okutsu
  • Patent number: 4330617
    Abstract: The compounds represented by the general formula (I) or (II) as defined in the specification are novel and useful developing agent precursors in silver halide photographic light sensitive materials.
    Type: Grant
    Filed: February 4, 1981
    Date of Patent: May 18, 1982
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Minoru Ohashi, Katsuaki Iwaosa
  • Patent number: 4324856
    Abstract: A photographic silver halide material is disclosed which contains a precursor of photographic chemicals.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: April 13, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Satoshi Kawakatsu, Shigeto Hirabayashi, Hidetaka Ninomiya, Yutaka Kaneko
  • Patent number: 4310621
    Abstract: New DIR-compounds of the formula ##STR1## are useful in photographic materials and processes.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: January 12, 1982
    Assignee: AGFA-Gevaert Aktiengesellschaft
    Inventors: Heinrich Odenwalder, Karl Frank, Reinhard Muller
  • Patent number: 4278750
    Abstract: Novel electron donor precursors have the structure: ##STR1## where: R is an alkali labile group;Y is an aliphatic or aromatic group; andZ is an electron withdrawing group.The compounds are useful in photographic elements, film units and processes to provide electrons to immobile compounds which must accept at least one electron before releasing a diffusible dye or photographic reagent.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: July 14, 1981
    Assignee: Eastman Kodak Company
    Inventor: Chung Y. Chen
  • Patent number: 4266002
    Abstract: Photographic elements, film units, processes and alkaline processing compositions are described wherein certain substituted 1-phenyl-3-pyrazolidinones are employed as electron transfer agents in color image transfer materials. The silver halide electron transfer agents or precursors thereof have the following formula: ##STR1## wherein: R is hydrogen or a hydrolyzable moiety;R.sub.1 is hydrogen or a hydroxy group;R.sub.2, R.sub.3 and R.sub.4 each represent hydrogen, hydroxy, an alkyl group of 1 to 3 carbon atoms, an alkoxy group of 1 to 3 carbon atoms, a phenyl group, --NHSO.sub.2 R.sub.5, --O(CH.sub.2).sub.n OR.sub.6, --(CH.sub.2).sub.n OR.sub.6, --O(CH.sub.2).sub.n C.sub.6 H.sub.5, --(CH.sub.2).sub.n R.sub.7, or --O(CH.sub.2).sub.n R.sub.7 ;R.sub.5 is hydrogen or an alkyl group of 1 to 3 carbon atoms;R.sub.6 is hydrogen or a methyl group;R.sub.7 is NHS0.sub.2 R.sub.5 or SO.sub.2 NHR.sub.5 ; andn is a positive integer of 1 to 2;with the proviso that at least one of R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: May 5, 1981
    Assignee: Eastman Kodak Company
    Inventors: Michael D. McCreary, William C. Farley, Wayne F. Erickson
  • Patent number: 4263393
    Abstract: Novel electron donor precursors have the structure: ##STR1## wherein: Z represents the atoms to complete a mono-, bi- or tricyclic ring system, each ring of which contains 5 to 6 nuclear atoms;n is 1 or 2;R.sup.1 is a monovalent aromatic group when n is 1 and a bivalent aromatic group when n is 2; andR.sup.2 represents hydrogen, an alkyl group, an aryl group, an acyl group, an ester group or an amido group.The compounds are useful in photographic elements, film units and processes to provide electrons to immobile compounds which must accept at least one electron before releasing a diffusible dye or photographic reagent.
    Type: Grant
    Filed: September 6, 1979
    Date of Patent: April 21, 1981
    Assignee: Eastman Kodak Company
    Inventor: Chin H. Chen
  • Patent number: 4199354
    Abstract: Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photograhically useful group.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: April 22, 1980
    Assignee: Eastman Kodak Company
    Inventors: Jerald C. Hinshaw, Paul B. Condit
  • Patent number: 4199355
    Abstract: Photographic elements, processes for forming images in photographic elements and new compounds are disclosed. Generally, the invention relates to improved immobile compounds which can be used to provide positive images from negative recording-developing photographic materials such as negative silver halide emulsions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable of releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photographically useful group.
    Type: Grant
    Filed: June 24, 1975
    Date of Patent: April 22, 1980
    Assignee: Eastman Kodak Company
    Inventors: Jerald C. Hinshaw, Paul B. Condit
  • Patent number: 4192679
    Abstract: Photographic elements, film units and processes are described having bifunctional benzisoxazolones of the formula: ##STR1## wherein: R is alkyl or aryl;DEV is a silver halide developing agent;Ball is at least one organic ballasting radical of such molecular size and configuration as to render the compound nondiffusible in the photograhic element during development in an alkaline processing composition; andn is a positive integer of 1 to 4.The compounds are employed in negative-working, color image transfer elements and release the developer upon processing. The remainder of the compound functions to scavenge oxidized developer. The compounds can be located in an emulsion layer or in a dye image-providing material layer, and in a ballasted form can be located in an interlayer.
    Type: Grant
    Filed: November 15, 1978
    Date of Patent: March 11, 1980
    Assignee: Eastman Kodak Company
    Inventor: Wayne F. Erickson