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:
Mar. 23, 1993
Filed:
Dec. 17, 1991
Applicant:
Inventors:
Hans-Rolf Dubal, Konigstein/Taunus, DE;
Mikio Murakami, Konigstein/Taunus, DE;
Otto Herrmann-Schonherr, Bensheim, DE;
Arnold Schneller, Mainz, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528171 ; 528173 ; 528183 ; 528185 ; 528193 ; 528208 ; 528220 ; 528229 ; 528310 ; 528331 ; 528336 ; 528338 ; 528339 ; 528341 ; 528344 ; 528347 ; 528348 ; 528349 ; 528350 ; 428-1 ; 4284744 ;
Abstract
Preparation of specially substituted aromatic polyamides containing structural units of the formula I mentioned and copolyamides containing at least 10 mol % of structural units of the formula I and structural units of the formula II mentioned and their use as orientation layer in liquid crystal display elements and/or liquid crystal switching elements.