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:
Dec. 05, 1978
Filed:
Sep. 22, 1977
Applicant:
Inventors:
Erwin Geyken, Munich, DE;
Peter Dawidowitsch, Munich, DE;
Assignee:
Agfa-Gevaert AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03D / ; G03C / ; C02B / ;
U.S. Cl.
CPC ...
96 63 ; 96 5 / ; 96 6 / ; 210 60 ;
Abstract
In a method for separately treating the used developing fluid from the remaining used photographic processing fluids prior to feeding the used fluids to a sewer system. The used developing fluid is continually withdrawn from the developing tank and chemically neutralized in a collecting vessel by a chemical oxidizing agent such as acetic acid or hydrogen peroxide prior to feeding the fluid to a sewer system. The method includes the continued withdrawal of spent fixer fluid to a silver recovery device and recirculation of the regenerated fixer fluid to the fixer tank.