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:
Jul. 13, 1993
Filed:
Mar. 05, 1991
Applicant:
Inventor:
Peter Harnischfeger, Darmstadt, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ; B29C / ; B29C / ;
U.S. Cl.
CPC ...
264544 ; 264108 ; 264500 ; 264510 ; 264570 ; 427165 ; 428910 ;
Abstract
A process for aligning a layer of a liquid-crystalline, polymeric material in which a gas or liquid stream is passed over the liquid-crystalline, polymeric material, preferably for aligning main-chain polymers which have a nematic phase by passing a hot stream of air onto the material. Electrooptical displays which contain an alignment layer of this type have high contrast. The alignment layers have advantages over conventional rubbed alignment layers since, for example, no electrostatic charging takes place.