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:
Dec. 07, 1999
Filed:
Dec. 02, 1998
Judith A Bose, Webster, NY (US);
Ronald R Valente, Rochester, NY (US);
Dino Aimino, Newark, NY (US);
Deborah D DeMejo, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Photographic pyrazolotriazole dye forming coupler compound or coupler intermediate compounds can be readily prepared by inducing an elimination-addition reaction between certain pyrazolotriazole compounds and aromatic amines in the presence of an inorganic base or formate. Yields and purity are high, and reaction time is reduced with the specific set of conditions and reactants, and environmental impact from waste is reduced. The resulting compounds can be used themselves as photographic dye forming couplers or further reacted to prepare useful coupler compounds for photographic use.