Abstract: A silver ion scavenger layer is employed between adjacent silver halide strata to enhance color separation in multicolor photographic images prepared by processes which utilize the imagewise distribution of silver ions and/or soluble silver complex made available during development to liberate a corresponding imagewise distribution of dye or dye intermediate from a color-providing compound.

Abstract: This invention relates to indole (na) phthalide indicator dyes substituted with a particular class of hydrogen bonding groups, such as, perhaloalkyl carbinols. These dyes are useful as optical filter agents in photographic processes to protect a selectivity exposed photosensitive material from further exposure during processing in the presence of incident light.

Abstract: Certain 4-hydroxypyrazoles are employed as silver halide developing agents which find particular utility in diffusion transfer photographic processes.

Abstract: Alkanes containing an intralinear sulfonyl group and a (dialkylamino)oxosulfonium group separated by -CH- are employed as silver halide solvents in photographic processes and compositions.

Abstract: Alkanes containing an intralinear sulfonyl group and an intralinear sulfinyl group separated by a single carbon substituted with at least one hydrogen atom are employed as silver halide solvents in photographic processes and compositions.

Abstract: Alkanes containing an intralinear sulfonyl group and an intralinear 1-piperazinylsulfonamido group separated by a single carbon substituted with at least one hydrogen atom are employed as silver halide solvents in photographic processes and compositions.

Abstract: In one embodiment, the present invention relates to novel heterocyclic compounds as represented in the following formula ##STR1## wherein R and R' each are hydrogen or alkyl, Y is .dbd.O or .dbd.NH and n is a positive integer from 1 to 7.In another embodiment, the present invention is directed to the use of the above-denoted class of heterocyclic compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.

Abstract: This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes.A class of intermediates provided by the present invention comprises compounds of the formula: ##STR1## wherein A represents 4'-hydroxy-1'-naphthyl; B represents 4'-hydroxy-1'-naphthyl or indol-3-yl and C represents a 2-carboxy-1-phenyl radical or an 8-carboxy-1-naphthyl radical and preferably is 8-carboxy-1-naphthyl.

Abstract: This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as indoles, and to a process of preparing novel intermediates useful therein. According to the present invention, the selected carbocyclic compound or the selected N-heterocyclic compound is reacted with phthalaldehydic or naphthalaldehydic acid to form the corresponding (na)phthalidyl adduct which is treated with an oxidizing agent to yield the subject intermediates. To prepare the indicator dye, the intermediate, i.e., the oxidation product thus obtained is then reacted with a carbocyclic or heterocyclic aryl compound to yield the corresponding indicator dye. The oxidation products comprising the novel intermediates of the present invention may be dehydro or hydrated (na)phthalidyl adducts.

Abstract: This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as indoles, and to a process of preparing novel intermediates useful therein. According to the present invention, the selected carbocyclic compound or the selected N-heterocyclic compound is reacted with phthaladehydic or naphthalaldehydic acid to form the corresponding (na)phthalidyl adduct which is treated with an oxidizing agent to yield the subject intermediates. To prepare the indicator dye, the intermediate, i.e., the oxidation product thus obtained is then reacted with a carbocyclic or heterocyclic aryl compound to yield the corresponding indicator dye. The oxidation products comprising the novel intermediates of the present invention may be dehydro or hydrated (na)phthalidyl adducts.

Abstract: 1,3-Disulfonylcycloalkanes substituted in the 2-position with at least one hydrogen atom are employed as silver halide complexing agents in both conventional and diffusion transfer photography. Preferred compounds are those possessing an S-containing moiety substituted in the 2-position and particularly those containing 6, 7 or 8 members in the cyclic ring and substituted in the 2-position with R.sup.2 -S--CH.sub.2m wherein R.sup.2 is a hydrocarbon radical and m is a whole number 0 to 5. The latter thioether-substituted 1,3-disulfonylcycloalkanes comprise the novel compounds of the present invention.

Abstract: This invention relates to styrene polymers containing pendant aminoethanethiol moieties which are useful as complexing agents for silver ions and/or soluble silver complex in photography.

Abstract: This invention relates to highly fluorinated diazides of the formula N.sub.3 CH.sub.2 (CF.sub.2).sub.x CH.sub.2 N.sub.3 wherein x is a positive integer from 2 to 12; to the preparation of these diazides by the reaction of excess sodium azide with a ditosylate of the formula C.sub.7 H.sub.7 SO.sub.3 CH.sub.2 (CF.sub.2).sub.x CH.sub.2 O.sub.3 SC.sub.7 H.sub.7 wherein x has the same meaning given above; and to the synthesis of highly fluorinated primary diamines of the formula H.sub.2 NCH.sub.2 (CF.sub.2).sub.x CH.sub.2 NH.sub.2 wherein x has the same meaning given above by catalytic hydrogenation of said diazides.

Abstract: This invention relates to 1-naphthol (na)phthalide indicator dyes substituted with a particular class of hydrogen bonding groups, such as, perhaloalkyl carbinols. These dyes are useful as optical filter agents in photographic processes to protect a selectively exposed photosensitive material from further exposure during processing in the presence of incident light.

Abstract: This application is directed to compounds of the formula ##STR1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen, lower alkyl or --CH.sub.2 ).sub.m S--CH.sub.2).sub.n Y wherein m is a whole number 2 to 5, n is a whole number 1 to 4 and Y is hydrogen, --OH or --COOR wherein R is hydrogen or lower alkyl; and X is ##STR2## wherein A is a halide or sulfonate, R.sup.3 is hydrogen or --CH.sub.2).sub.n Y wherein n and Y have the same meaning given above, R.sup.4 is --CH.sub.2).sub.n Y wherein n and Y have the same meaning given above and R.sup.5 is lower alkyl. These compounds are useful as silver halide solvents in photography.

Abstract: This invention is concerned with pyridine N-oxides substituted in the ortho and/or para position with an alkylsulfonylmethyl group which find utility in photography for effecting an increase in photographic speed.

Abstract: This invention relates to meso-ionic tetrazole compounds of the formula: ##STR1## wherein X.sup.- is -S.sup.- or -Se.sup.

Abstract: This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as indoles, and to a process of preparing novel intermediates useful therein. According to the present invention, the selected carbocyclic compound or the selected N-heterocyclic compound is reacted with phthalaldehydic or naphthalaldehydic acid to form the corresponding (na)phthalidyl adduct which is treated with an oxidizing agent to yield the subject intermediates. To prepare the indicator dye, the intermediate, i.e., the oxidation product thus obtained is then reacted with a carbocyclic or heterocyclic aryl compound to yield the corresponding indicator dye. The oxidation products comprising the novel intermediates of the present invention may be dehydro or hydrated (na)phthalidyl adducts.

Abstract: This invention relates to a class of indicator dyes useful as optical filter agents in photographic processes to protect a selectively exposed photosensitive material from further exposure during processing in the presence of incident light. Such dyes comprise 3,3-disubstituted phthalides and 3,3-disubstituted naphthalides wherein one of the 3,3-substituents is an indol-3-yl radical substituted with hydrogen on the heterocyclic N atom and the other of said 3,3 substituents is a p-hydroxycarbocyclic aryl radical selected from a 4'-hydroxy-1'-phenyl radical and a 4'-hydroxy-1'-naphthyl radical.

Abstract: This invention relates to a process of preparing phthalein indicator dyes including phthalides and naphthalides derived from certain hydroxy-substituted carbocyclic aryl compounds, such as phenols, and from certain N-heterocyclic aryl compounds, such as indoles, and to a process of preparing novel intermediates useful therein. According to the present invention, the selected carbocyclic compound or the selected N-heterocyclic compound is reacted with phthalaldehydic or naphthalaldehydic acid to form the corresponding (na)phthalidyl adduct which is treated with an oxidizing agent to yield the subject intermediates. To prepare the indicator dye, the intermediate, i.e., the oxidation product thus obtained is then reacted with a carbocyclic or heterocyclic aryl compound to yield the corresponding indicator dye. The oxidation products comprising the novel intermediates of the present invention may be dehydro or hydrated (na)phthalidyl adducts.