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:
Aug. 15, 2006
Filed:
Nov. 15, 2002
Go Ono, Chiba, JP;
Kio Mizuno, Chiba, JP;
Hideyuki Endo, Chiba, JP;
Nissan Chemical Industries, Ltd., Tokyo, JP;
Abstract
A liquid crystal alignment treating agent containing a polyamic acid which is represented by the following formula (I) and exhibits a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methyl-2-pyrrolidone at 30° C. at a concentration of 0.5 g/dl) or a polyimide obtained by cyclodehydration thereof: wherein Rrepresents a tetravalent organic group, at least 20 mol % of which has a fused alicyclic structure composed of two to five rings, and all of the carbonyl groups are directly bonded to the alicyclic structure and that any two carbonyl groups are not bonded to adjacent carbon atoms of the alicyclic structure; Ris a bivalent organic group, from 20 to 100 mol % of which has in the side-chain structure at least one structural unit selected from the group consisting of Clong-chain alkyl, Cfluoroalkyl, alicyclic structures and aromatic ring structures; and L is a positive integer.