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. 24, 1998
Filed:
Nov. 01, 1995
Applicant:
Inventors:
Brian Carl Auman, Newark, DE (US);
Edgar Bohm, Griesheim, DE;
Assignees:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Merck Patent GmbH, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C09K / ; B32B / ;
U.S. Cl.
CPC ...
528353 ; 528125 ; 528128 ; 528172 ; 528173 ; 528176 ; 528183 ; 528185 ; 528188 ; 528220 ; 528229 ; 528350 ; 428-1 ; 4284735 ;
Abstract
A polyimide alignment film based on pyromellitic dianhydride and a bis(4-aminophenoxy) aromatic compound, such as 1,3-bis(4-aminophenoxy)benzene or 1,4-bis(4-aminophenoxy)benzene, providing low tilt angles of from to 2 degrees when used in liquid crystal displays.