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:
Mar. 09, 1976
Filed:
Mar. 12, 1973
Applicant:
Inventor:
Max Heilmann, Cologne, DT;
Assignee:
AGFA-Gevaert Aktiengesellschaft, Leverkusen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
96 6 / ; 96 22 ; 96 55 ; 96 6 / ;
Abstract
Color film of the silver halide emulsion type is developed by a process which includes a bleach-fixing bath treatment to remove the silver image, followed by an oxidizing bath to restore to the dyes the color which they lost in the bleach-fixing bath. This oxidizing bath must contain an iron-III-complex of an amino polyacetic acid as the oxidizing agent, e.g. the sodium-salt of the iron-III-complex of ethylene diamine tetra-acetic acid.