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. 23, 1999
Filed:
Aug. 26, 1997
Wataru Yamashita, Fukuoka, JP;
Tomomi Yoshimura, Kanagawa, JP;
Atsushi Shibuya, Kanagawa, JP;
Yoshihiro Sakata, Kanagawa, JP;
Hideaki Oikawa, Kanagawa, JP;
Keisuke Takuma, Kanagawa, JP;
Masahiro Ohta, Kanagawa, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A low birefringent organic optical component prepared from a resin consisting essentially of one or more repetitive structural units selected from the group consisting of structures represented by general formula (1); ##STR1## wherein A is either of the groups below. ##STR2## The organic optical component can exhibit excellent transparency, heat resistance and mechanical strength as well as a low birefringence. Also provided is a novel aromatic polyamide with a low permitivity and excellent transparency, processability and thermal stability, besides excellent heat resistance inherent in an aromatic polyamide.