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:
Aug. 20, 1991
Filed:
Nov. 20, 1989
James J Huson, Penfield, NY (US);
Louis F Valente, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Phenolic cyan-dye-forming couplers characterized by a p-cyanophenylureido group in the 2-position of the phenol are synthesized in high yield by a process comprising the steps of contacting, in a reaction solvent in the presence of a transition metal catalyst at moderate temperature and atmospheric pressure, a coupler intermediate having a nitro group in the 5-position with a hydrogen donor, such as, for example, ammonium formate, to thereby form the corresponding 2-(p-cyanophenylureido)-5-aminophenol and reacting the 2-(p-cyanophenylureido)-5-aminophenol with an acylating agent to form the phenolic cyan-dye-forming coupler.