Minnesota Mining and Manufacturing Company

Eastman-kodak Company

Ivan H Skoog

Ronald W Burrows

Bernard A Lea

Charles G Barlow

Thomas D Hellings

James B Philip, Jr

Thomas J Kub

Robert F Coles

Gary L Featherstone

Vinyl sulfone and/or .beta.-halo sulfone compounds have been found to improve fog stability on shelf aging of photothermographic imaging elements. These elements comprise a photosensitive silver halide, silver salt oxidizing agent and reducing agent for silver ion in a binder.

Photothermographic elements

Infra-red sensitizing dyes for silver halide having a nucleus of the general formula: ##STR1## in which Q represents Cl or Br,

Infra-red sensitizing dyes for silver halide

Infra-red sensitizing dyes for silver halide having a mucleus of the general formula: ##STR1## in which: Q represents Cl or Br,

Infra-red sensitising dyes for silver halide

Novel cyanine dye salts having an alkoxyaryl function joined by a vinylene linkage to a heterocyclic nucleus are useful as desensitizers in fogged, direct positive type of silver halide emulsions.

Desensitizing dyes for photographic emulsions

Dyes of the formula ##STR1## WHEREIN R.sub.c is a monovalent chromophoric radical, M is a sulfonyl, carbonyl, or carbonyloxy bridging radical, R.sub.f is a monovalent saturated fluoroaliphatic radical, and R is a monovalent organic radical selected from cyano, MR.sub.f, or aryl sulfonyl. A wide spectrum of unusually brilliant colors is available.

Organic dye having fluoroaliphatic substituent

Dyes of the formula ##EQU1## WHEREIN R.sub.c is a monovalent chromophoric radical, M is a sulfonyl, carbonyl, or carbonyloxy bridging radical, R.sub.f is a monovalent saturated fluoroaliphatic radical, and R is a monovalent organic radical selected from cyano, MR.sub.f, or aryl sulfonyl. A wide spectrum of unusually brilliant colors is available.

Growing community of inventors

Lake Elmo, MN, United States of America

Ivan H Skoog