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:
Apr. 01, 2003
Filed:
Apr. 16, 2001
Applicant:
Inventors:
James A. Foley, Wellesley, MA (US);
Michael P. Filosa, Medfield, MA (US);
Stephen J. Telfer, Arlington, MA (US);
John L. Marshall, Lexington, MA (US);
David P. Waller, Lexington, MA (US);
Assignee:
Polaroid Corporatiion, Waltham, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C 8/06 ; G03C 8/10 ; G03C 8/26 ; G03C 8/28 ; G03C 8/52 ;
U.S. Cl.
CPC ...
G03C 8/06 ; G03C 8/10 ; G03C 8/26 ; G03C 8/28 ; G03C 8/52 ;
Abstract
A self-developing diffusion transfer photographic film unit which includes a latent image which becomes visible upon photographic processing of the film unit. The latent image is formed with a chemical compound such as an indicator dye and the visible image formed from the latent image as a result of photographic processing may be transient or permanent. Also described are diffusion transfer photographic methods.