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:
Jul. 26, 2011
Filed:
Mar. 31, 2008
Applicants:
Jun Yonezawa, Tokyo, JP;
Eiko Kobayashi, Tokyo, JP;
Masahito Kuramitsu, Tokyo, JP;
Yuko Fukuoka, Tokyo, JP;
Kimihiro Kubo, Tokyo, JP;
Hiroshi Shirai, Tokyo, JP;
Inventors:
Jun Yonezawa, Tokyo, JP;
Eiko Kobayashi, Tokyo, JP;
Masahito Kuramitsu, Tokyo, JP;
Yuko Fukuoka, Tokyo, JP;
Kimihiro Kubo, Tokyo, JP;
Hiroshi Shirai, Tokyo, JP;
Assignee:
Asahi Kasei Chemicals Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 33/02 (2006.01); C08L 33/04 (2006.01); C08L 33/18 (2006.01); C08L 33/20 (2006.01); C08L 35/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical material having a high birefringence and a small absolute value of a photoelastic coefficient is provided by use of a resin composition for an optical material comprising a resin (a) having a positive photoelastic coefficient and a negative inherent birefringence and a resin (b) having a negative photoelastic coefficient and a negative inherent birefringence.