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:
Jul. 17, 2001
Filed:
May. 23, 2000
Applicant:
Inventors:
David J. Valvo, Rochester, NY (US);
Hugh G. McGuckin, Rochester, NY (US);
John S. Badger, Webster, NY (US);
Assignee:
Eastman Kodak Company, Rochester, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C 5/46 ;
U.S. Cl.
CPC ...
G03C 5/46 ;
Abstract
A two-part sepia toning kit can be used to provide desired stable, warm sepia toned images in black-and-white photographic positive or negative materials such as black-and-white photographic prints. One part of the kit includes a silver bleaching composition comprising a hexacyanoferrate as the bleaching agent and halide ions in a molar ratio of at least 2.25:1. The second part is a toning composition that includes a sulfur-containing toning agent.