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. 07, 1986
Filed:
Sep. 26, 1984
Applicant:
Inventors:
Patrick F King, No. Quincy, MA (US);
Stephen G Stroud, Allston, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430223 ; 430222 ; 430225 ; 430226 ; 430563 ;
Abstract
Diffusion transfer photographic color products and processes are described in which there are utilized novel chrome complexed neutral tone black image dye-providing materials which include either a 1-naphthol-2'-naphthol-1', 2-azo dye moiety or a 2-naphthol-2'naphthol-1, 1'-azo dye moiety, a parasubstituted phenyl azo-pyrazolone dye moiety and a cation. The image dye-providing material includes a diffusion control moiety such as a hydroquinonyl group or a precursor thereof and may be diffusible or nondiffusible as a function of the diffusion control moiety.