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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.:

US 6808657 B1

PDFFull Text
Date of Patent:
Oct. 26, 2004

Filed:

Feb. 12, 2002

Process for preparing a k-type polarizer

Applicant:
Inventors:

Duane D. Fansler, Dresser, WI (US);

Todd D. Jones, Saint Paul, MN (US);

Babu N. Gaddam, Woodbury, MN (US);

Robert T. Fitzsimons, Minneapolis, MN (US);

Steven M. Heilmann, Afton, MN (US);

John J. Cael, Upton, MA (US);

Assignee:

3M Innovative Properties Company, St. Paul, MN (US);

Attorney:

Kent S. Kokko

Primary Examiner:

Mathieu D Vargot

Int. Cl.
CPC ...
B29D 1/100 ;
U.S. Cl.
CPC ...
B29D 1/100 ;
Abstract

A process for preparing a polarizer is described whereby an article comprising an oriented, vinylalcohol polymer film layer, and an acid donor layer comprising a photoacid generator, is exposed to radiant energy at a temperature sufficient to effect a partial dehydration of the vinylalcohol polymer to a vinylalcohol/poly(acetylene) copolymer.

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Fansler, Duane. (2004). Process for preparing a k-type polarizer (U.S. Patent No. 6808657). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6808657

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