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. 26, 1999
Filed:
Dec. 19, 1997
Narendra S Kadaba, Newton, MA (US);
Lori P Shah, Bedford, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A method is provided for the manufacture of a polyvinylidene-based light polarizer (cf., a 'K Sheet'-type polarizer). In one embodiment, the polyvinylidene chromophore of said polarizer is produced by the acid catalyzed dehydration of an oriented polymeric starting material, the acid catalyst being introduced in the method as a bonding agent used to secure the starting material to a carrier web (or other supporting substrate). Advantages of the method include reduced frequency of 'streaking' and 'mottling'; good processing speed; and the ability to use a low acid concentration, resulting in a correspondingly low-corrosion processing environment.