Eastman-Kodak Company

Thomas E Gompf

Jared B Mooberry

Claude F Gerbal

Pierre D Collet

Philip T Lau

Richard P Dunlap

Brian H Johnston

William Henry Faul

Roy L Orvis

Howell Allen Hammond

The present invention provides an acetate ester compound of formula (III), ##STR1## a process for synthesizing compound (III), and a process for using that compound to prepare a pyrazolone compound, where the substituent definitions are as defined in the Summary of the Invention.

Acetate ester compounds

Photographic elements and assemblages are described which employ nondiffusible compounds which release photographically useful groups in an imagewise manner as the result of a .beta.-elimination reaction.

Photographic products employing novel nondiffusible compounds which

A nondiffusible sulfonamido compound which is alkali-cleavable upon oxidation to release a diffusible photographically useful material, said nondiffusible sulfonamido compound having the formula: ##STR1## wherein: (a) R.sup.1 is alkyl, aryl sulfamyl, carbamyl, carbonamido, carbonyl, carbonyloxy or sulfonamido;

Substituted sulfonamido compounds, photosensitive elements, film units,

Novel 5-pyrazolone magenta dye-forming couplers are blocked with a coupler moiety which yields an alkali-soluble or colorless reaction product. The coupler moiety is joined via its coupling position to the enol oxygen of the 5-pyrazolone and is displaced therefrom during processing as a result of reaction by means of oxidized color developing agent to thereby activate the 5-pyrazolone coupler. These couplers have good reactivity and good resistance to aerial contaminants, such a formaldehyde, and can be incorporated in photographic emulsions and elements.

Silver halide elements containing blocked pyrazolone magenta dye-forming

Color photographic elements are disclosed having, incorporated therein, one or more novel phenolic materials which have the following structure: ##STR1## wherein R.sub.1 is a non-interfering alkyl, aryl, amino, substituted alkyl or substituted aryl ballasting group of the type which is useful in photographic incorporated cyan color-forming couplers, and R.sub.2 is hydrogen or a lower alkyl group.

Silver halide emulsions with incorporated 4,6-difluorophenolic couplers

Color photographic elements, compositions and processes for producing color negative images are described which employ a leuco dye comprising the reaction product of a color forming coupler and a N,N-dialkyl-p-phenylenediamine having an electronegative group attached to the benzene ring. The leuco dye is stable against aerial oxidation and can be developed to its corresponding dye with certain black and white developing compositions.

Growing community of inventors

Penfield, NY, United States of America

Thomas E Gompf