Open Chain Keto-methylene Coupler Patents (Class 430/556)
  • Patent number: 4576909
    Abstract: A silver halide color photographic light-sensitive material comprising a support having at least one silver halide emulsion layer in which there is provided a polymer coupler and a compound of the formulaAr--O--RO).sub.p H [I]wherein Ar is an aryl group, R is an alkylene group, and p is an integer from to 1 to 3.
    Type: Grant
    Filed: October 4, 1984
    Date of Patent: March 18, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Sohei Goto, Ken Okauchi
  • Patent number: 4565777
    Abstract: A silver halide color photographic light-sensitive material is described, comprising a coupler represented by formula (I): ##STR1## wherein A represents the residue of a coupler, R.sub.1 represents an alkyl group having from 4 to 15 carbon atoms, R.sub.2 represents an alkyl group having from 1 to 20 carbon atoms, with the total number of carbon atoms of R.sub.1 and R.sub.2 being from 8 to 27.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: January 21, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akira Ogawa, Kozo Aoki, Osami Tanabe, Makoto Umemoto
  • Patent number: 4540658
    Abstract: A silver halide color photographic product with dye images having improved fastness to light is disclosed. The product has at least one dye image forming layer on a support and further includes at least one of the compounds of formula (I) or (II) in said dye image forming layer and/or an adjoining or an adjacent layer: ##STR1## wherein R is an alkyl group, an aryl group or a heterocyclic group; X is an alkylene group; and Y is an alkylene or arylene group; and ##STR2## wherein R.sub.1 is a hydrogen atom, an alkyl group or an aryl group; R.sub.2 and R.sub.3 are each an alkyl group; Y.sub.1 is an alkylene or arylene group; Z is an oxygen atom, a sulfur atom, a sulfonyl group, a carbonyl group or an alkylene group; and n is an integer of 1 to 20.
    Type: Grant
    Filed: June 24, 1983
    Date of Patent: September 10, 1985
    Assignee: Konishiroku Photo Industry Co. Ltd.
    Inventors: Masao Sasaki, Kaoru Onodera
  • Patent number: 4537857
    Abstract: A silver halide light-sensitive material having a support and at least one silver halide emulsion is provided. The silver halide emulsion layer contains in combination at least one cyan coupler of Formula (I) and at least one cyan coupler of Formula (II).
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: August 27, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shun Takada, Kaoru Onodera, Takashi Kadowaki
  • Patent number: 4533625
    Abstract: A color photographic light-sensitive material which contains a photographic coupler having a naphthalene nucleus in the bonding position other than the coupling position, wherein the naphthalene nucleus contains at least one hydroxyl group and at least one sulfonyl group as a substituent or contains at least one hydroxyl group and at least one sulfinyl group as a substituent is disclosed.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: August 6, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Seiji Ichijima, Takeshi Hirose
  • Patent number: 4529691
    Abstract: Yellow couplers corresponding to the formula ##STR1## wherein Y represents an aromatic, aliphatic or cycloaliphatic group,X represents hydrogen or a releasable group,R.sup.1 represents halogen, andR.sup.2 and R.sup.3 each represent an alkyl group having 1 to 20 carbon atoms,are readily soluble in oil formers and undergo coupling with a high color yield. They are resistant to heat and moisture and undergo color development to yield stable yellow dyes with an absorption maximum below 450 nm. They have a high absorption capacity in the near UV region and are virtually unaffected by fluctuations in the pH during processing.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: July 16, 1985
    Assignee: Agfa-Gevaert AG
    Inventors: Gunter Renner, Erich Wolff, Friedhelm Sommer, Herbert Stark, Dieter Stieler, Egon Meier
  • Patent number: 4525450
    Abstract: A silver halide color photographic light-sensitive material containing a coupler having at least one of a sulfamoylphenylenesulfonyl group, a sulfamoylaminophenylenesulfonyl group and a sulfonamidophenylenesulfonyl group as a substituent. Preferred couplers are represented by the formula: ##STR1## wherein all moieties are defined in the specification wherein Cp is a coupler residue, L is a divalent linking group and X represents --NHSO.sub.2 --, ##STR2## or --SO.sub.2 NH, and n represents 0-4. Groups R.sup.1, R.sup.2 and R.sup.3 are defined in the specification.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: June 25, 1985
    Inventors: Isamu Itoh, Takeshi Hirose
  • Patent number: 4524132
    Abstract: A color photographic silver halide light-sensitive material is described, comprising a support base having thereon a silver halide emulsion layer wherein said material contains at least one coupler represented by formula (I) ##STR1## wherein A represents a yellow coupler residue, a magenta coupler residue, or a cyan coupler residue; R.sub.1 represents a substituted or unsubstituted acyclic or cyclic alkylene group; R.sub.2 represents a halogen atom, a hydroxyl group, a cyano group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted acylamino group, a substituted or unsubstituted sulfonamido group or a substituted or unsubstituted acyl group; and n represents an integer of 0 to 3.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: June 18, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kozo Aoki, Makoto Umemoto, Akira Ogawa
  • Patent number: 4517283
    Abstract: A color-photographic recording material which, in at least one light-sensitive silver halide emulsion layer, an interlayer and/or a protective layer, contains a stabilizer mixture comprising(i) a compound with at least one group of the formula ##STR1## or a polymer with recurring structural units of the formula I, and (ii) a phenolic antioxidant.Color images obtained by imagewise exposure and development of this color-photographic recording material show good stability to the action of visible and ultraviolet light.With respect to the definitions of the substituents in formula I, reference is made to the description.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: May 14, 1985
    Assignee: Ciba-Geigy AG
    Inventors: David G. Leppard, Jean Rody
  • Patent number: 4513082
    Abstract: A silver halide color photographic light-sensitive material containing at least one coupler having a ballast group represented by the following general formula (I): ##STR1## wherein X represents a halogen atom, an alkyl group, an aryl group, a heterocyclic group, a hydroxy group, an alkoxy group, an aryloxy group, an acylamino group, a sulfonamido group, a carbamoyl group, a sulfamoyl group, a ureido group, an alkoxycarbonyl group, an alkoxycarbonylamino group, a sulfonyl group, an alkylthio group, a cyano group, a nitro group or a carboxyl group, l represents an integer of 1 to 4, and m represents an integer of 1 or 2, with the proviso that when X represents a hydroxyl group, a substituent other than a hydroxy group is also present on the phenyl ring.
    Type: Grant
    Filed: March 23, 1984
    Date of Patent: April 23, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Furutachi, Takeshi Hirose
  • Patent number: 4507386
    Abstract: A silver halide photographic emulsion containing a coupler for photography, comprising silver halide particles in said emulsion consisting essentially of 2 mole % or less of silver iodide, 50 to 97 mole % of silver bromide and 1 to 50 mole % of silver chloride, and said particles are core/shell type silver halide particles containing a higher content of said 50 to 97 mole % silver bromide in the surface layers of said particles than in the inner portions thereof, the surface layer of said particles containing 70 to 100 mole % of silver bromide and the inner portion containing 40 to 70 mole % of silver bromide.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: March 26, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Syoji Matsuzaka, Makoto Kajiwara, Masanobu Miyoshi, Kiyoshi Yamashita
  • Patent number: 4481268
    Abstract: A method of forming a photographic azo or azamethine dye image in an exposed photographic silver halide element, the method of comprising the steps of (a) developing the imagewise exposed material to form an imagewise pattern of oxidized color developing agent, (b) reacting the oxidized color developing agent with a color coupler to produce an image dye, characterized in that at least one of the color developing agent and the color coupler possesses a metal chelating site such that the image dye is capable of forming a bi-, tri- or higher-dentate metallized dye, and (c) contacting the image dye with polyvalent metal ions to form a metallized dye image. Specified color developing agents include heterocyclic substituted hydrazides and specified couplers include benziso-oxazolones and 2H-pyrazolo-[3,4-b]pyridines in addition to more conventional compounds.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: November 6, 1984
    Assignee: Eastman Kodak Company
    Inventors: Joseph Bailey, David Clarke, Michael W. Crawley, Peter D. Marsden, Jasbir Sidhu
  • Patent number: 4458011
    Abstract: The present invention relates to compounds of the type comprising a ballasting group which renders said compounds substantially fast to diffusion in hydrophilic colloid media and at least one photographically useful group which is chemically linked to said ballasting group, and to photographic elements containing at least one compound of the type referred to.The ballasting groups in the compounds according to the present invention are derived from mono- or di-esters or -ethers of glycerol. The linkage between ballasting group and photographically useful group can be realized via acid chlorides which are derived from the above-said glycerol derivatives.
    Type: Grant
    Filed: October 29, 1982
    Date of Patent: July 3, 1984
    Assignee: AGFA-Gevaert, N.V.
    Inventors: Christian C. Van de Sande, Jan J. Vandewalle, Marcel J. Monbaliu, Raphael K. Van Poucke
  • Patent number: 4456681
    Abstract: A color photographic material comprising on a support a first silver halide emulsion layer containing a yellow coupler, a second silver halide emulsion layer containing a magenta coupler, a third silver halide emulsion layer containing a cyan coupler, said third emulsion layer being positioned farthest from the support, a first non-light-sensitive layer formed on one side of said third emulsion layer opposite to the support, and a second non-light-sensitive layer formed on the other side of said third emulsion layer, at least said first non-light sensitive layer containing a UV absorber.
    Type: Grant
    Filed: May 27, 1983
    Date of Patent: June 26, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takashi Kadowaki, Kaoru Onodera
  • Patent number: 4444870
    Abstract: A silver halide color photographic light-sensitive material comprising a support having thereon a layer containing at least one copolymer coupler latex having a layered structure capable of forming a dye upon coupling with an oxidation product of an aromatic primary amine developing agent. The polymer coupler latex having a layered structure has an exceptionally good color forming property and is capable of forming a dye with a high yield and without the formation of undesired stains and fogs. The silver halide color photographic light-sensitive material containing the polymer coupler latex has good film strength and a reduced layer thickness and provides a color image having an improved sharpness. A method of forming a color image using the silver halide color photographic light-sensitive material is also disclosed.
    Type: Grant
    Filed: September 7, 1982
    Date of Patent: April 24, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tsumoru Hirano, Keiji Mihayashi, Morio Yagihara
  • Patent number: 4443536
    Abstract: Photographic couplers comprising a coupler moiety and a ballast moiety have advantageous properties when the ballast moiety is terminated with a hydroxyphenylsulfonyl or hydroxyphenylsulfinyl group. The couplers are useful in photographic emulsions and element.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: April 17, 1984
    Assignee: Eastman Kodak Company
    Inventor: Gregory J. Lestina
  • Patent number: 4433050
    Abstract: A direct positive type light sensitive silver halide photographic material is disclosed. At least one layer containing an unfogged internal latent image type silver halide emulsion, is provided on a support, and an internal latent image type silver halide emulsion having fog centers in silver halide grains, is incorporated in said layer or in another constituent layer of the photographic material. A dye image forming substance may be incorporated in the same layer or in a separate layer to form a color diffusion transfer type light sensitive photograhic material. The photographic materials present a positive image having a high maximum density and a low minimum density.
    Type: Grant
    Filed: September 9, 1981
    Date of Patent: February 21, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takao Abe, Satoru Hohnishi
  • Patent number: 4430424
    Abstract: The invention relates to a color photographic light-sensitive material comprising a support and a hydrophilic colloid layer coated thereon, said layer comprising a non-diffusible coupler and a hydrophilic colloid layer having an aromatic primary amine developing agent and/or its precursor and a polymer layer coated thereon wherein said polymer is permeable to an alkaline processing liquid but less permeable to said aromatic primary amine developing agent and/or its precursor, and the diffusion rate of said aromatic primary amine developing agent and/or its precursor, when dissolved in the alkaline processing liquid, in the polymer layer is not greater than 5.times.10.sup.-8 cm.sup.2 /sec per second at room temperature.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: February 7, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ken Okauchi, Tatsuhiko Kobayashi
  • Patent number: 4410624
    Abstract: The invention relates to a process of dispersing oil-soluble photographic additives having a silver-halide base for information recording materials.According to the invention, compounds of the following general formula: ##STR1## are used as auxiliary dispersing agents. The symbolsR represents hydrogen, alkyl with 1 to 8 C atoms,M represents hydrogen, alkali metal, ammonium, andX represents OR or SO.sub.3 M.
    Type: Grant
    Filed: March 26, 1982
    Date of Patent: October 18, 1983
    Assignee: VEB Filmfabrik Wolfen
    Inventors: Dieter Plaschnick, Christoph Roth, Bernd Noll, Walter Kroha, Lothar Kuhnert
  • Patent number: 4352873
    Abstract: A silver halide color photographic material comprising: a support; and a plurality of photographic layers including silver halide emulsion layer formed thereon, wherein one of said photographic layers is comprised of a compound containing recurring unit represented by formula (I) ##STR1## wherein R represents a hydrogen, an alkyl group having 1 to 6 carbon atoms, or a halogen group; M represents hydrogen, an alkali metal, an alkaline earth metal, or an organic base; X represents an alkyl group having 1 to 6 carbon atoms, an alkoxy group, an alkylamino group or a halogen group; m represents 0, 1, or 2 and n represents 1 or 2.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: October 5, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yuzo Toda, Junji Koizumi, Masasi Ogawa, Hidefumi Sera, Seiiti Kubodera
  • Patent number: 4336327
    Abstract: A silver halide color photographic light-sensitive material containing a yellow color coupler represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, a methyl group or a halogen atom; R.sub.4 represents an aryl group which may be substituted; and X.sub.1 represents a hydrogen atom or a group capable of coupling off.The color photographic light-sensitive material provides a yellow color image having exceptional fastness to light.
    Type: Grant
    Filed: December 17, 1980
    Date of Patent: June 22, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Mitsugu Tanaka, Momotoshi Tsuda
  • Patent number: 4315069
    Abstract: Color photographic material is described in which a yellowish image is formed which can be used to print black and white prints. Also present in the layer is a small amount of a more reactive coupler which produces a colored image to which black and white paper is not sensitive. This more reactive coupler reduces the fog in the highlight areas.Most preferably small amounts of other couplers are present which result in a green or brown image which makes it easier for the operator to focus the image.
    Type: Grant
    Filed: September 11, 1980
    Date of Patent: February 9, 1982
    Assignee: Ciba Geigy AG
    Inventors: John G. V. Scott, Anthony K. Harvey
  • Patent number: 4310618
    Abstract: Novel dye-forming couplers have the structure: ##STR1## wherein: Z represents the atoms to complete, with the attached oxygen atom, the same or different 5-pyrazolone dye-forming coupler moiety, phenol dye-forming coupler moiety or naphthol dye-forming coupler moiety, the * in the ring completed by Z representing the coupling position;R is hydrogen or a coupling-off group;Bl is a blocking group removable, during development, from the coupler moiety completed by Z to which it is directly attached; andn is an integer of 2 to 4.
    Type: Grant
    Filed: May 30, 1980
    Date of Patent: January 12, 1982
    Assignee: Eastman Kodak Company
    Inventors: Jose M. Fernandez, Joseph P. Pepe
  • Patent number: 4283486
    Abstract: A silver halide color photographic light-sensitive material comprising a paper support, at least one color image-forming emulsion layer, and an oxygen-impermeable layer having an oxygen permeability of not more than 2.0 ml/m.sup.2 .multidot.hr.multidot.atm, said color image-forming layer and oxygen-impermeable layer being provided on the same side of the paper support.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: August 11, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiaki Aono, Takeshi Hirose
  • Patent number: 4273861
    Abstract: A multilayer color photographic material with improved color reproduction comprising a support having thereon at least two photosensitive silver halide emulsion layers which provide color images having different colors from each other, the multilayer color photographic material containing at least one interlayer color correction coupler as defined hereinafter.
    Type: Grant
    Filed: February 23, 1976
    Date of Patent: June 16, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Takeshi Hirose, Jun Hayashi, Atsuaki Arai, Nobuo Furutachi, Harumi Katsuyama
  • Patent number: 4268591
    Abstract: Light-sensitive recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## in which R.sub.1 is alkyl, R.sub.2 is alkyl or aryl and R.sub.3 is substituted or unsubstituted alkyl, alkoxy or alkylmercapto, cycloalkylmercapto, aryl, aryloxy or arylmercapto, the sum of the carbon atoms in the substituents R.sub.1, R.sub.2 and R.sub.3 being 3 to 30 and at least two of these substituents being able to form a cyclic radical together with the carbon atom to which they are bonded, the R.sub.4 s are each halogen, alkyl, alkoxy, halogenoalkyl, alkylsulfonyl or aryloxy, X is a radical detachable during the coupling reaction, A is a 5-membered, heterocyclic, unsaturated ring system which contains 2 or 3 hetero-atoms, at least one of which is a nitrogen atom, and can be fused with a benezene ring and which is substituted by at least one ballast group and r is 1 or 2.
    Type: Grant
    Filed: August 28, 1979
    Date of Patent: May 19, 1981
    Assignee: Ciba-Geigy AG
    Inventor: Paul Tschopp
  • Patent number: 4248961
    Abstract: Light-sensitive recording material for color photography is provided which contains, in at least one silver halide emulsion layer, a yellow coupler of the formula ##STR1## in which R and R' are alkyl, cycloalkyl or aryl and X.sub.1 and X.sub.2 are radicals which are detachable during the coupling reaction, Y is halogen, alkyl, alkoxy, alkylmercapto, --CN, --COOH, carbalkoxy, --NH.sub.2, --NHR.sub.1, --NR.sub.1 R.sub.2 or --NHCOR.sub.1, in which R.sub.1 and R.sub.2 are alkyl or phenyl, Z is alkyl having 5 to 40 carbon atoms, alkoxy having 5 to 40 carbon atoms, cycloalkoxy having 5 to 12 carbon atoms or aralkyl; alkoxyalkyl, alkoxycycloalkyl, cycloalkoxyalkyl, optionally substituted phenoxyalkyl, alkylamino- and dialkylamino-alkyl, optionally substituted arylamino- and diarylamino-alkyl, alkylmercaptoalkyl or optionally substituted arylmercaptoalkyl, in which radicals the sum of the carbon atoms in each case is 6 to 40; or --COOR.sub.3, --COR.sub.3, --NR.sub.3 R.sub.4, --CONR.sub.3 R.sub.4, --NR.sub.4 COR.sub.
    Type: Grant
    Filed: May 2, 1979
    Date of Patent: February 3, 1981
    Assignee: Ciba-Geigy AG
    Inventors: Remon Hagen, Mario Fryberg
  • Patent number: 4248949
    Abstract: A method of stabilizing organic substrate materials against the action of light is disclosed wherein at least one compound represented by the following general formula (I) is made to coexist with the organic substrate material ##STR1## wherein M represents a Cu, Co, Ni, Pd or Pt atom, R.sup.1 represents an alkyl or an aryl group, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 may be the same or different and each represents a hydrogen atom, a halogen atom, an alkyl group or an aryl group. Alternatively, R.sup.2 and R.sup.3, R.sup.3 and R.sup.4 or R.sup.4 and R.sup.5 may combine together to form a 6-membered ring. A photographic material containing the above compound is also disclosed.
    Type: Grant
    Filed: December 15, 1978
    Date of Patent: February 3, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Hara, Kotaro Nakamura, Yoshiaki Suzuki
  • Patent number: 4242430
    Abstract: Organic substrates, especially photographic dyes, are stabilized against light by using a Cu, Co, Ni, Pd or Pt complex of formula (I). ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt; R.sub.1 and R.sub.6 may be the same or different and represent a hydrogen atom or an alkyl group, an aryl group, an acyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an alkylsulfonyl group or an arylsulfonyl group; and R.sub.2, R.sub.3, R.sub.4 and R.sub.5 which may be the same or different represent a hydrogen atom, a halogen atom, a cyano group, or an alkyl group, an aryl group, a cycloalkyl group or a heterocyclic group bonded to a carbon atom on a benzene ring directly or through a divalent linking group, or R.sub.2 and R.sub.3, R.sub.3 and R.sub.4 or R.sub.4 and R.sub.5 respectively may combine and represent the non-metallic atomic groupings required to form a 6-membered ring.
    Type: Grant
    Filed: November 14, 1978
    Date of Patent: December 30, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Hara, Kotaro Nakamura, Yoshiaki Suzuki
  • Patent number: 4241154
    Abstract: The stability of organic substrate materials having an absorption peak between 300 and 800 nm in wavelength can be improved by the presence of a compound represented by the following general formula (I), ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt atom; Cat represents a divalent cation or two monovalent cations; X represents S or a ##STR2## group where R.sup.1 and R.sup.2 each represents a CN, a COR.sup.3, a COOR.sup.4, a CONR.sup.5 R.sup.6, or a SO.sub.2 R.sup.7 group and R.sup.1 may combine with R.sup.2 to form a 5- or 6-membered ring; R.sup.3, R.sup.4 and R.sup.7 each represents an alkyl or an aryl group, R.sup.5 and R.sup.6 each represents a hydrogen atom, an alkyl or an aryl group, and n represents an integer of 1 or 2.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: December 23, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Hara, Yoshiaki Suzuki
  • Patent number: 4241172
    Abstract: A silver halide color photographic material comprising a coupler represented by the following general formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 individually represent a substituted or unsubstituted alkyl, alkenyl, aryl, cycloalkyl group, or,-A-X).sub.n ].sub.m Cp in which Cp represents a cyan coupler, magenta coupler or yellow coupler, A represents a substituted or unsubstituted divalent aliphatic group, X represents a divalent group, and m and n individually represent a value of 0 or 1, provided that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is -A-X).sub.n ].sub.m Cp.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: December 23, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenichiro Okaniwa, Takashi Uchida, Morio Kobayashi, Hiroshi Sugita, Takashi Sasaki
  • Patent number: 4239843
    Abstract: The stability of organic substrates having an absorption maximum between 300 and 800 nm in wavelength can be improved by at least one compound represented by the formula (I); ##STR1## wherein M represents Cu, Co, Ni, Pd or Pt; X.sub.1, X.sub.2, X.sub.3 and X.sub.4 eachrepresents an oxygen or sulfur atom, R.sub.1 and R.sub.2 each represents an alkyl, an aryl, a cycloalkyl, an oxocyclalkyl or a heterocyclic group attached to the carbon atom on the chelate ring directly or through a divalent connecting group, R.sub.3 represents a hydrogen atom, an alkyl, an aryl, a cycloalkyl, an oxocycloalkyl or a heterocyclic group attached to the carbon atom on the chelate ring directly or through a connecting group whereby R.sub.1, R.sub.2 and R.sub.3 may be the same or different and R.sub.1 and R.sub.3 or R.sub.2 and R.sub.3 may combine with each other to form a 5-, 6- or 7- member ring structure.
    Type: Grant
    Filed: October 30, 1978
    Date of Patent: December 16, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Hara, Yoshiaki Suzuki
  • Patent number: 4238564
    Abstract: Recording material for color photography, which contains, in at least one silver halide emulsion layer, at least one yellow coupler of the formula ##STR1## in which R.sub.1, R.sub.2, and R.sub.3 and R.sub.4 are alkyl, cycloalkyl or aryl, X.sub.1, X.sub.2, X.sub.3 and X.sub.4 are radicals detachable during the coupling reaction and Y.sub.1 and Y.sub.2 are halogen, alkyl, alkoxy, alkylmercapto, --CN, --COOH, carbalkoxy, --NH.sub.2, --NHR.sub.5, --NR.sub.5 R.sub.6 or --NHCOR.sub.5, in which R.sub.5 and R.sub.6 are alkyl or phenyl, Z is a divalent bridge member and r is 1 or 2.Photographic colored images with excellent spectral absorption characteristics and good resistance to light, heat and moisture are obtained by exposing the recording material image-wise and developing.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: December 9, 1980
    Assignee: Ciba-Geigy Aktiengesellschaft
    Inventor: Mario Fryberg
  • 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: RE30211
    Abstract: Color photographic elements containing silver halide and incorporated color-forming materials are described. These elements contain at least two differentially light-sensitive emulsion layers, the overlying layer being sensitive to the relatively shorter wavelengths and containing at least one yellow dye-forming color coupler which has the unusual ability to inhibit the reaction of competing couplers (such as citrazinic acid, for example) when competing couplers are used in color developing solutions in the conventional manner. Use of these couplers in the overlying (color) layer of multi-layer color photographic elements makes it possible to produce colored images having improved graininess.Couplers having this unusual capability are selected from those having the .[.structures.]. .Iadd.structure .Iaddend. ##STR1## wherein R.sub.1, .Iadd.and .Iaddend.R.sub.2 .[.and R.sub.3 .]. are as defined herein.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: February 12, 1980
    Assignee: Eastman Kodak Company
    Inventors: Robert G. Cameron, Dan Neuberger