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:
Jun. 27, 2000
Filed:
Jul. 17, 1997
Atsuo Otsuji, Kanagawa, JP;
Keisuke Takuma, Kanagawa, JP;
Rihoko Suzuki, Kanagawa, JP;
Tatsuhiro Urakami, Kanagawa, JP;
Toshihiro Motoshima, Kanagawa, JP;
Wataru Yamashita, Fukuoka, JP;
Tomomi Yoshimura, Kanagawa, JP;
Atsushi Shibuya, Kanagawa, JP;
Yoshihiro Sakata, Kanagawa, JP;
Hideaki Oikawa, Kanagawa, JP;
Masahiro Ohta, Kanagawa, JP;
Masanobu Ajioka, Kanagawa, JP;
Masatoshi Takagi, Kanagawa, JP;
Akio Karasawa, Kanagawa, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
A low-birefringent organic optical component comprising a polymer prepared by polymerizing a racemic mixture of the monomer with an asymmetric spiro ring represented by general formula (1) as an essential ingredient; wherein ring A represents a monocyclic or polycyclic organic group, wherein two ring As are mutually bound each other via a spiro bond to form a spiro ring which has a molecular asymmetric structure; n is an integer of 0 to 10; X.sub.1 and Y.sub.1 are binding groups; and Z.sub.1 is a polymerization-active group. The component has excellent transparency, mechanical strength and heat resistance, as well as a low birefringence.