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:
May. 25, 1993
Filed:
Nov. 21, 1991
Applicant:
Inventors:
Kohei Arakawa, Kanagawa, JP;
Sumio Ohtani, Kanagawa, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ;
U.S. Cl.
CPC ...
428-1 ; 428522 ; 428910 ; 359 73 ;
Abstract
Disclosed is a phase difference film in the form of a uniaxially stretched film having a negative intrinsic birefringence which is made of a styrene/acrylonitrile copolymer. The copolymer has a styrene unit and an acrylonitrile unit in the range of 85/15 to 50/50 by weight (former/latter) and a weight-average molecular weight in the range of 200,000 to 900,000. The liquid crystal display provided with the phase difference film is also disclosed.
Arakawa, Kohei. (1993). Phase difference film and liquid crystal display having the same (U.S. Patent No. 5213852). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5213852
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile