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:
Feb. 17, 2026
Filed:
May. 21, 2021
Applicant:
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Inventors:
Assignee:
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 75/08 (2006.01); C08G 63/682 (2006.01); G02B 1/04 (2006.01); G02C 7/02 (2006.01);
U.S. Cl.
CPC ...
C08G 75/08 (2013.01); C08G 63/682 (2013.01); G02B 1/04 (2013.01); G02C 7/022 (2013.01); C08G 2261/3223 (2013.01);
Abstract
A composition for an optical material contains (a) an episulfide compound, (b) a polymerization catalyst, and (c) an ester compound having a halogen at the α position. The (c) ester compound having a halogen at the α position is preferably at least one compound selected from the group consisting of dimethyl chloromalonate, diethyl chloromalonate, dimethyl bromomalonate, and diethyl bromomalonate.