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:
Nov. 12, 1991
Filed:
Jun. 04, 1990
Applicant:
Inventors:
Yasuyuki Takiguchi, Kawasaki, JP;
Akihiko Kanemoto, Yokohama, JP;
Shigeki Iida, Kawasaki, JP;
Takehiro Toyooka, Yokohama, JP;
Assignees:
Ricoh Company, Ltd., Tokyo, JP;
Nippon Oil Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ;
U.S. Cl.
CPC ...
428-1 ; 4284735 ; 359 76 ; 359103 ;
Abstract
Disclosed herein is a substrate with a liquid crystal polymeric thin film comprising a substrate, an orientation film formed on said substrate and a thermotropic liquid crystal polymeric thin film formed on said orientation film, in which the orientation film comprises a polyimide having a glass transition point of higher than 300.degree. C. obtained by cyclizing a polyamic acid or its derivative coated on said substrate and applying a rubbing treatment.