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.

Date of Patent:
Mar. 29, 1994

Filed:

Oct. 11, 1991
Applicant:
Inventors:

Shinichi Hirose, Isehara, JP;

Jean F Clerc, Machida, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
264-26 ; 428-1 ; 359 73 ;
Abstract

Ionomer resin sheet is stretched in one direction in the plane of sheet to give uniaxial anisotropy, and then heated above the melting point under pressure to cause relaxation of the anisotropy. After cooling, a sheet of biaxial anisotropy is obtained. The degree of anisotropy depends on the initial stretching, heating temperature, heating time and pressure.


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Hirose, Shinichi. (1994). Optical birefringence compensator adapted for lcd (U.S. Patent No. 5298199). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5298199

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