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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 5382648 B1

PDFFull Text
Date of Patent:
Jan. 17, 1995

Filed:

Apr. 01, 1993

Twisted nematic film, a method for the preparation thereof, and a

Applicant:
Inventors:

Stephen J Picken, Arnhem, NL;

Gustaaf R Mohlmann, Dieren, NL;

Assignee:

Akzo Nobel nv, Arnhem, NL;

Attorneys:

Fennelly; Richard P.

Morris; Louis A.

Primary Examiner:

Maurice J Welsh

Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 75 ; 528 76 ; 528 78 ; 528 79 ; 528 85 ; 427 58 ; 428-1 ; 430 20 ; 430270 ;
Abstract

The invention relates to a twisted nematic film comprising a non-crosslinked liquid-crystalline polymer having a Tg above 75.degree. C. and a rotational viscosity (.gamma.) of less than 5000 Pascal.seconds (Pa.s) between Tg and Tni. Such twisted nematic films are used in displays. The invention further relates to methods for the preparation of these twisted nematic films, to the use of said twisted nematic films for optical data storage and in writable compact disks and to a display device comprising such a twisted film.

Find Patent Forward Citations

Picken, Stephen. (1995). Twisted nematic film, a method for the preparation thereof, and a (U.S. Patent No. 5382648). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5382648

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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