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:
Sep. 06, 1977
Filed:
Jun. 05, 1974
Applicant:
Inventors:
Immo Boie, Cologne, DT;
Dieter Lowski, Bergheim, Erft, DT;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
9610 / ; 96 562 ; 96 563 ; 96 564 ; 96 565 ; 2603191 ; 26032616 ;
Abstract
A light-sensitive color photographic material containing at least one silver halide emulsion layer and a 2-equivalent yellow coupler which carries at the coupling position a 5-membered heterocyclic ring with at least one nitrogen atom which nitrogen atom is attached to the coupling position of the yellow coupler and which ring has in the position adjacent to the said nitrogen atom an ethylenic double bond which forms part of an olefinically unsaturated or of an aromatic 5-membered heterocyclic ring, which ring can be split off in the coupling reaction. The new 2-equivalent yellow couplers are easy to prepare, highly reactive and photographically substantially inert.