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:
Jan. 14, 1997
Filed:
May. 14, 1996
Applicant:
Inventors:
Edward P Lindholm, Brookline, MA (US);
James J Manning, Braintree, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430213 ; 430215 ; 430227 ;
Abstract
There is described a novel diffusion transfer film unit for use in a diffusion transfer photographic system which includes a layer comprising a polyester urethane polymer(s) which is inert to alkali, and specifically, a layer which exhibits permeability to alkali inversely dependent upon temperature. Diffusion transfer photographic systems utilizing the diffusion transfer film unit of the present invention exhibit superior hot temperature processing.
Quick Actions:
Lindholm, Edward. (1997). Diffusion transfer film unit (U.S. Patent No. 5593810). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5593810
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile