The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 1983
Filed:
Jan. 14, 1981
Yasushi Usagawa, Hino, JP;
Wataru Fujimatsu, Hachioji, JP;
Osamu Sasaki, Hino, JP;
Katsumi Matsuura, Hachioji, JP;
Abstract
A method of forming a cyan dye image by development of an exposed silver halide photographic material with a developer containing a cyan coupler having one of the following formulae: ##STR1## wherein R.sub.1 is a hydrogen atom or alkyl having 1 to 20 carbon atoms; R.sub.2 is alkyl, aryl, or a hetero ring; R.sub.3 is hydrogen or halogen; X is arylene or alkylene; Z is a coupling off group; n is 1 or 2; ##STR2## wherein Cy, Cy' and Cy' are individually a cyclic aliphatic, aromatic or heterocyclic group; R, R' and R' are individually alkyl; A is hydrogen or a monovalent organic group, Y is a divalent organic group, K, l, m, m' m' are individually 0 or 1, provided that when m=0, Cy is a cyclic aliphatic or heterocyclic group.