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:
Jan. 03, 1978
Filed:
Dec. 10, 1974
Applicant:
Inventors:
Burton H Waxman, Endwell, NY (US);
Michael C Mourning, Vestal, NY (US);
Theodore Panasik, Vestal, NY (US);
Assignee:
GAF Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
96 2 / ; 96-3 ; 96 55 ; 96 562 ; 96 563 ; 96 564 ; 96 565 ; 96 6 / ; 96 6 / ; 96 74 ; 96 77 ; 96 95 ; 9610 / ;
Abstract
A derivative of paraphenylenediamine, for use as a color developer, having a primary amino group available for oxidative coupling, and a carboxy group bound to the benzene ring to provide the compound with the required stability to enable the compound to be incorporated into a photographic film, the compound being non-diffusible during development of the photographic film in an alkaline processing solution.