Cyan dye-forming couplers

Jul 6, 1981

Novel phenolic cyan dye-forming couplers contain in the 2-position a p-cyanophenylureido group. These couplers are useful in photographic emulsions, elements and processes.

Description

Patent History

Patent number: T101601
Type: Grant
Filed: Jul 6, 1981
Date of Patent: Mar 2, 1982
Inventor: Philip T. S. Lau (Rochester, NY)
Application Number: 6/280,594

Classifications

Current U.S. Class: Phenols (h Of -oh May Be Replaced By A Group Ia Or Iia Light Metal) (568/716); Nonsilver Image (430/17); Identified Cyan Dye Color (430/384); Substituted At Coupling Position With Other Than Hydrogen (430/385); Phenol Or Naphthol Coupler (430/552); Substituted At Coupling Position With Other Than Hydrogen (430/553)
International Classification: C07C 3904;