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. 14, 2018
Filed:
Sep. 28, 2015
Applicant:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Inventors:
Noriyuki Kato, Tokyo, JP;
Manabu Hirakawa, Tokyo, JP;
Takashi Motoi, Okayama, JP;
Mitsuharu Kitamura, Niigata, JP;
Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 63/02 (2006.01); G02B 1/04 (2006.01); C08G 64/30 (2006.01); C08L 69/00 (2006.01); G02B 5/30 (2006.01); C08L 33/06 (2006.01);
U.S. Cl.
CPC ...
G02B 1/041 (2013.01); C08G 64/305 (2013.01); C08L 33/06 (2013.01); C08L 69/005 (2013.01); G02B 5/3083 (2013.01); C08J 2369/00 (2013.01);
Abstract
The present invention addresses the problem of providing a resin having a high Abbe number and a small difference in hygroscopic expansion coefficient with respect to a polycarbonate resin having a low Abbe number and a high refractive index. The above problem can be solved by a polycarbonate resin including structural units represented by general formula (1). In general formula (1), R represents H, CH, or CH.