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:
Oct. 19, 1982
Filed:
Aug. 25, 1980
Applicant:
Inventors:
William T MacLeish, North Andover, MA (US);
Ehud Shchori, Brookline, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430216 ; 20415914 ;
Abstract
Elements for use in a photographic diffusion transfer process comprising a sheet-like support having a polymeric acid neutralizing layer bonded thereto, wherein said polymeric acid layer is formed from a composition including a crosslinking agent that effects temporary crosslinks within said polymeric layer to promote resistance to aqueous interference during film unit assembly, but which readily hydrolyze under processing conditions so as to accommodate swelling of the polymeric layer in the presence of alkali processing composition.