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. 14, 1983
Filed:
Nov. 24, 1981
Applicant:
Inventors:
Michael J Hopper, Taylors, SC (US);
Michael R Martin, Greenville, SC (US);
Lawrence Bolt, Van Nuys, CA (US);
Michael Smith, Thousand Oaks, CA (US);
Ali Tavasolian, North Hollywood, CA (US);
Assignee:
American Hoechst Corporation, Somerville, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; G02F / ;
U.S. Cl.
CPC ...
4284237 ; 156229 ; 15624424 ; 1562722 ; 156280 ; 350337 ; 350397 ; 428483 ; 428520 ; 428522 ;
Abstract
A polarizer having increased hydrolytic stability is produced by impregnating a polyvinyl alcohol substrate with an iodine containing composition and then subjecting the substrate to both concentrated infrared and ultraviolet radiation treatments sufficient to substantially increase the hydrolytic stability of the thusly formed polarizer. The polyvinyl alcohol film had been laminated to a polyester support with a dispersed, aqueous composition of polyvinyl alcohol or polyurethane on its surface.