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:
Nov. 19, 2013
Filed:
Feb. 04, 2008
Masanori Iwazumi, Irvine, CA (US);
Nobuo Kawato, Kurume, JP;
Mamoru Tanaka, Fukuoka, JP;
Hidetoshi Hayashi, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Masanori Iwazumi, Irvine, CA (US);
Nobuo Kawato, Kurume, JP;
Mamoru Tanaka, Fukuoka, JP;
Hidetoshi Hayashi, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Mitsui Chemicals, Inc., Minato-Ku, Tokyo, JP;
Abstract
The polymerization catalyst for a polythiourethane-based optical material of the present invention includes a sulfonate represented by the following general formula (1). Furthermore, in the formula, R, R, Rand Reach independently represent an alkyl group having 1 to 18 carbon atoms, R, R, Rand Rmay be bonded to each other to form a ring. Rrepresents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and X represents a nitrogen atom or a phosphorus atom.