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. 03, 2025
Filed:
Nov. 26, 2020
Applicant:
Zeon Corporation, Tokyo, JP;
Inventor:
Hironari Sudeji, Tokyo, JP;
Assignee:
ZEON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 61/08 (2006.01); G02B 1/04 (2006.01);
U.S. Cl.
CPC ...
C08G 61/08 (2013.01); G02B 1/04 (2013.01); C08G 2261/3324 (2013.01); C08G 2261/418 (2013.01);
Abstract
Provided are a cycloolefin polymer simultaneously having a high refractive index, a low Abbe number, and low birefringence and also a method of producing this cycloolefin polymer and an optical element in which this cycloolefin polymer is used. The cycloolefin polymer is a polymer, or hydrogenated product thereof, said polymer comprising a structural unit derived from a naphthyl group-containing alicyclic compound (A) represented by following formula (1), in a specific proportion. In formula (1), one of Rto Ris a naphthyl group and remaining groups among Rto Rand Rare as defined in the specification.