Eastman-kodak Company

Frederick J Sauter

Wolfgang H Gunther

Richard L Parton

David A Stegman

George J Burgmaier

Larry D Edwards

Dyes and photographic elements containing them as silver halide sensitizing dyes, which dyes have the structure: ##STR1## wherein: X1 and X2 each independently represent the atoms necessary to complete a benzo-condensed 5- or 6-membered heterocyclic nucleus, which, in addition to being substituted by Z1 and Z2 respectively, may be further substituted or unsubstituted;

Amide substituted dye compounds and silver halide photographic elements

A merocyanine dye having the formula: ##STR1## wherein: R.sup.1 and R.sup.2 independently are H, alkyl, alkoxy, or aryl, and

Novel sulfur-containing merocyanine dyes

A merocyanine dye having the formula: ##STR1## wherein: R.sub.1 and R.sub.2 independently are H, alkyl, alkoxy or aryl

A merocyanine dye having the formula: ##STR1## wherein: R.sub.1 and R.sub.2 independently are H, alkyl, alkoxy or aryl; R.sub.7 and R.sub.8 are H or

Sulfoalkyl benzoxazoleinylidene butenylidene thiobarbituric acid

A merocyanine dye having the formula: ##STR1## wherein: R.sub.1 and R.sub.2 independently are H, alkyl, alkoxy or aryl,

Novel selenium-containing merocyanine dyes

Photographic silver halide is spectrally sensitized by means of at least one bleachable spectral sensitizing dye comprising a cyanine dye nucleus and a particular N-methylene substituent. The spectrally sensitized photographic silver halide is useful in a photothermographic material. An image in the photothermographic material, after exposure, is developed and the spectral sensitizing dye is bleached, especially at elevated pH, by heating the photothermographic material to processing temperature.

Growing community of inventors

Rochester, NY, United States of America

Frederick J Sauter