Blocked Developers Patents (Class 430/959)
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Patent number: 4537853Abstract: 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: GrantFiled: February 21, 1984Date of Patent: August 27, 1985Assignee: Agfa-Gevaert, N.V.Inventors: Christian C. Van de Sande, Andre Verhecken, Wilhelmus Janssens
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Patent number: 4522917Abstract: 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: GrantFiled: November 18, 1983Date of Patent: June 11, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Seiji Ichijima, Keiji Mihayashi, Isamu Itoh
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Patent number: 4518685Abstract: 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: GrantFiled: April 17, 1984Date of Patent: May 21, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Morio Yagihara, Akihiko Ikegawa, Mitsunori Ono, Yuji Mihara
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Patent number: 4503139Abstract: 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: GrantFiled: May 9, 1983Date of Patent: March 5, 1985Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick, Nancy M. Sofen
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Patent number: 4500636Abstract: 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: GrantFiled: January 27, 1984Date of Patent: February 19, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Mitsunori Ono, Isamu Itoh, Keiji Mihayashi, Yukio Karino
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Patent number: 4499181Abstract: 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: GrantFiled: June 2, 1983Date of Patent: February 12, 1985Assignee: Konishiroku Photo Ind., Co., Ltd.Inventors: Kazumasa Watanabe, Hidetaka Deguchi, Shunji Suginaka
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Patent number: 4493888Abstract: 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: GrantFiled: July 15, 1983Date of Patent: January 15, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsusuke Endo, Eiichi Kato, Nobutaka Ohki, Takatoshi Ishikawa
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Patent number: 4483919Abstract: 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: GrantFiled: December 23, 1983Date of Patent: November 20, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Hidetoshi Kobayashi, Isamu Itoh, Yasuhiro Yoshioka, Keiji Mihayashi, Noriyuki Inoue
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Patent number: 4473635Abstract: 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: GrantFiled: May 18, 1983Date of Patent: September 25, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Takatoshi Ishikawa, Katsusuke Endo, Sigeru Kuwazima, Eiichi Kato, Nobutaka Ohki
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Patent number: 4446216Abstract: 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: GrantFiled: November 23, 1982Date of Patent: May 1, 1984Inventors: Norman A. Smith, Stephen R. Postle, William E. Long
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Patent number: 4439519Abstract: 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: GrantFiled: May 5, 1983Date of Patent: March 27, 1984Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobutaka Ohki, Ken Kawata, Isamu Itoh
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Patent number: 4436810Abstract: 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: GrantFiled: April 29, 1983Date of Patent: March 13, 1984Assignee: Agfa-Gevaert AktiengesellschaftInventors: Karl Kuffner, Paul Marx, Wolfgang Lassig
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Patent number: 4426444Abstract: 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: GrantFiled: September 17, 1982Date of Patent: January 17, 1984Assignee: Ciba Geigy AGInventors: Stephen R. Postle, Patrick D. P. Thomas
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Patent number: 4420557Abstract: 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: GrantFiled: October 25, 1982Date of Patent: December 13, 1983Assignee: Agfa-Gevaert AktiengesellschaftInventors: Heinrich Odenwalder, Paul Marx
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Patent number: 4410618Abstract: .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: GrantFiled: June 11, 1982Date of Patent: October 18, 1983Assignee: Eastman Kodak CompanyInventors: James P. Vanmeter, Chin H. Chen
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Patent number: 4407941Abstract: 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: GrantFiled: March 8, 1982Date of Patent: October 4, 1983Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Shunji Suginaka, Ryuichiro Kobayashi, Satoru Ikeuchi, Noboru Mizukura, Noriko Fujita
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Patent number: 4358525Abstract: 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: GrantFiled: August 12, 1981Date of Patent: November 9, 1982Assignee: Eastman Kodak CompanyInventors: Jared B. Mooberry, William C. Archie, Jr.
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Patent number: 4358532Abstract: 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: GrantFiled: July 15, 1981Date of Patent: November 9, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Koyama, Shinsaku Fujita
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Patent number: 4340664Abstract: 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: GrantFiled: September 19, 1980Date of Patent: July 20, 1982Assignee: Agfa-Gevaert, N.V.Inventors: Marcel J. Monbaliu, Walter F. De Winter, Raphael K. Van Poucke
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Patent number: 4332878Abstract: 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: GrantFiled: April 30, 1981Date of Patent: June 1, 1982Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshitaka Akimura, Shigeo Hirano, Hiroyuki Mifune, Eiichi Okutsu
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Patent number: 4330617Abstract: 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: GrantFiled: February 4, 1981Date of Patent: May 18, 1982Assignee: Mitsubishi Paper Mills, Ltd.Inventors: Minoru Ohashi, Katsuaki Iwaosa
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Patent number: 4324856Abstract: A photographic silver halide material is disclosed which contains a precursor of photographic chemicals.Type: GrantFiled: October 7, 1980Date of Patent: April 13, 1982Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Satoshi Kawakatsu, Shigeto Hirabayashi, Hidetaka Ninomiya, Yutaka Kaneko
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Patent number: 4310621Abstract: New DIR-compounds of the formula ##STR1## are useful in photographic materials and processes.Type: GrantFiled: December 16, 1980Date of Patent: January 12, 1982Assignee: AGFA-Gevaert AktiengesellschaftInventors: Heinrich Odenwalder, Karl Frank, Reinhard Muller
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Patent number: 4278750Abstract: 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: GrantFiled: September 6, 1979Date of Patent: July 14, 1981Assignee: Eastman Kodak CompanyInventor: Chung Y. Chen
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Patent number: 4266002Abstract: 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: GrantFiled: October 1, 1979Date of Patent: May 5, 1981Assignee: Eastman Kodak CompanyInventors: Michael D. McCreary, William C. Farley, Wayne F. Erickson
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Patent number: 4263393Abstract: 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: GrantFiled: September 6, 1979Date of Patent: April 21, 1981Assignee: Eastman Kodak CompanyInventor: Chin H. Chen
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Patent number: 4199354Abstract: 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: GrantFiled: December 20, 1974Date of Patent: April 22, 1980Assignee: Eastman Kodak CompanyInventors: Jerald C. Hinshaw, Paul B. Condit
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Patent number: 4199355Abstract: 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: GrantFiled: June 24, 1975Date of Patent: April 22, 1980Assignee: Eastman Kodak CompanyInventors: Jerald C. Hinshaw, Paul B. Condit
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Patent number: 4192679Abstract: 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: GrantFiled: November 15, 1978Date of Patent: March 11, 1980Assignee: Eastman Kodak CompanyInventor: Wayne F. Erickson