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:
Jun. 30, 1998
Filed:
Mar. 29, 1996
Applicant:
Inventors:
Shirleyanne Elizabeth Haye, Rochester, NY (US);
Terrence Robert O'Toole, Rochester, NY (US);
David Leroy Cole, Rochester, NY (US);
John Michael Buchanan, Rochester, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430393 ; 430430 ; 430461 ; 430943 ; 430488 ; 430491 ; 430490 ; 430493 ;
Abstract
A simple and effective bleaching method includes the use of a bleaching solution including a peroxide bleaching agent and chloride ion in an amount of at least 0.35 mol/l. An organic phosphonic acid or tertiary aminocarboxylic acid can also be present for stability. The method is useful for bleaching color photographic films containing at least 20 mol % silver bromide and from 0 to about 0.5 mol % silver iodide in at least one silver halide emulsion.