Patents by Inventor James R. Bartels-Keith
James R. Bartels-Keith has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4847383Abstract: 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: January 18, 1985Date of Patent: July 11, 1989Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick, Nancy M. Sofen
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Patent number: 4713313Abstract: Compounds which include a quaternary group connected to a pyrimidine residue through a linkage are disclosed. These compounds are useful as silver halide solvents in photographic products, processes and compositions.Type: GrantFiled: May 2, 1984Date of Patent: December 15, 1987Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, deceased, Anthony J. Puttick, Lloyd D. Taylor
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Patent number: 4526965Abstract: Novel compounds which release thio- or selenourea moieties or derivatives thereof upon contact with aqueous alkaline compositions and are therefore useful in photographic applications. The compounds include, in addition to the thio- or selenourea moiety, a uracil blocking moiety and an anion.Type: GrantFiled: September 16, 1983Date of Patent: July 2, 1985Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Anthony J. Puttick
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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: 4442290Abstract: There are described novel compounds which are represented by the formula ##STR1## wherein R is ##STR2## A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R.sub.1 is H or lower alkyl; R.sub.2 is H or a hydrolyzable group; and R.sub.3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.Type: GrantFiled: March 29, 1982Date of Patent: April 10, 1984Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Anthony J. Puttick
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Patent number: 4371603Abstract: This invention relates to amino hydroxy cyclohexenones of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are alkyl, usually containing 1 to 20 carbon atoms.In another embodiment, the present invention is directed to the use of the above-denoted compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.Type: GrantFiled: December 30, 1980Date of Patent: February 1, 1983Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger
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Patent number: 4365085Abstract: The present invention relates to novel bicyclic compounds useful as photographic silver halide developing agents, to the preparation of these compounds and to photographic products, processes and compositions employing the same. The subject compounds may be represented by the formula ##STR1## wherein R.sub.1 and R.sub.2, the same or different, each represents hydrogen, a hydrocarbon moiety, preferably an alkyl group, --COOH or --COOR.sup.1 wherein R.sup.1 is an alkyl group; R.sub.3 and R.sub.4, the same or different, each represent hydrogen or an alkyl group, R.sub.5 represents hydrogen or --COR.sup.2 wherein R.sup.2 is an alkyl group; R.sub.6 represents hydrogen when R.sub.5 is hydrogen and represents hydrogen or --OCOR.sup.3 wherein R.sup.3 is an alkyl group the same as R.sup.2 when R.sub.5 represents --COR.sup.2 ; X represents --OH, --NH.sub.2 or --NHCOR.sup.4 wherein R.sup.4 represents an alkyl group the same as R.sup.2 ; Y represents --OH or --OCOR.sup.5 wherein R.sup.Type: GrantFiled: February 5, 1979Date of Patent: December 21, 1982Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger
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Patent number: 4350754Abstract: There are described novel compounds which are represented by the formula ##STR1## wherein R is ##STR2## A is sulfur or selenium; X represents the nonmetallic atoms necessary to form a nucleus which completes a five or six membered heterocyclic moiety; R.sub.1 is H or lower alkyl; R.sub.2 is H or a hydrolyzable group; and R.sub.3 is H, alkyl or a hydrolyzable group. The compounds are useful in photographic applications and provide controlled release of a photographically useful material during processing of photographic elements with an aqueous alkaline processing composition.Type: GrantFiled: June 12, 1981Date of Patent: September 21, 1982Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Anthony J. Puttick
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Patent number: 4304934Abstract: This invention relates to a method of synthesizing 3-amino-2-hydroxy-2-cyclopentenones possessing an aliphatic substituent in the 4-position which comprises reacting cyanoacetamide with an aliphatic aldehyde to yield the corresponding .beta.-substituted-.alpha.,.alpha.'-dicyanoglutaramide, hydrolyzing the amide to the corresponding .beta.Type: GrantFiled: December 30, 1980Date of Patent: December 8, 1981Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger, Jean B. Rogers
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Patent number: 4154611Abstract: The present invention relates to novel bicyclic compounds useful as photographic silver halide developing agents, to the preparation of these compounds and to photographic products, processes and compositions employing the same. The subject compounds may be represented by the formula ##STR1## wherein R.sub.1 and R.sub.2, the same or different, each represents hydrogen, a hydrocarbon moiety, preferably an alkyl group, --COOH or --COOR.sup.1 wherein R.sup.1 is an alkyl group; R.sub.3 and R.sub.4, the same or different, each represent hydrogen or an alkyl group, R.sub.5 represents hydrogen or --COR.sup.2 wherein R.sup.2 is an alkyl group; R.sub.6 represents hydrogen when R.sub.5 is hydrogen and represents hydrogen or --OCOR.sup.3 wherein R.sup.3 is an alkyl group the same as R.sup.2 when R.sub.5 represents --COR.sup.2 ; X represents --OH, --NH.sub.2 or --NHCOR.sup.4 wherein R.sup.4 represents an alkyl group the same as R.sup.2 ; Y represents --OH or --OCOR.sup.5 wherein R.sup.Type: GrantFiled: February 27, 1978Date of Patent: May 15, 1979Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Eva R. Karger
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Patent number: 4003910Abstract: This invention relates to meso-ionic tetrazole compounds of the formula: ##STR1## wherein X.sup.- is -S.sup.- or -Se.sup.Type: GrantFiled: August 18, 1975Date of Patent: January 18, 1977Assignee: Polaroid CorporationInventors: James R. Bartels-Keith, Mary T. Burgess