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:
Apr. 07, 1987
Filed:
May. 03, 1982
Applicant:
Inventors:
Efthimios Chinoporos, Belmont, MA (US);
Elbert M Idelson, West Newton, MA (US);
Patrick F King, Needham, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430225 ; 430224 ; 430559 ; 430562 ; 430563 ;
Abstract
There are described novel azo and azomethine dye developers which include a pyrazolone moiety having two silver halide developing groups. In one embodiment the dye developers are metal complexed. The dye developer compounds are useful in photographic products and processes.