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:
Nov. 22, 1977
Filed:
Dec. 23, 1975
Applicant:
Inventors:
Ernst Meier, Munich, DT;
Hans Heinrich Credner, Hohenschaeftlarn, DT;
Wolfgang Lassig, Munich, DT;
Karl Kuffner, Unterhaching, DT;
Karl-Wilhelm Schranz, Odenthal-Hahnenberg, DT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
96 564 ; 96 77 ; 9710 / ;
Abstract
Monocyclic oxazolinone-2 structures make good 2-equivalent photographic couplers, the oxazolinone-2 ring splitting during the coupling to form a dye. The couplers can be made by condensing an .alpha.-halocarbonyl compound with an inorganic cyanate in a substantially aprotic solvent that can contain a small amount of water.