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:
May. 10, 2011
Filed:
Jan. 26, 2007
Applicants:
Keisuke Ohta, Oita, JP;
Yasuyuki Oyama, Oita, JP;
Kazufumi Kai, Oita, JP;
Inventors:
Assignee:
Showa Denko K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F 28/06 (2006.01); C08F 228/06 (2006.01); C07D 339/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A radically polymerizable compound having a group represented by formula (1) (In the formula, Rto Reach independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, X represents an alkylene group having 1 to 4 carbon atoms.) and a radically polymerizable double bond and a composition for an optical material comprising the same have a high refractive index and excellent transparency and are hard to be oxidized in thermal curing and useful as an optical material with little tinting.