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. 30, 2021
Filed:
Mar. 14, 2019
Applicant:
Tokuyama Corporation, Shunan, JP;
Inventors:
Takayoshi Kawasaki, Shunan, JP;
Junji Momoda, Shunan, JP;
Tomohiro Kawamura, Shunan, JP;
Mayumi Kishi, Shunan, JP;
Michihito Nakatani, Shunan, JP;
Assignee:
TOKUYAMA CORPORATION, Shunan, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 9/94 (2006.01); C08F 212/08 (2006.01); C08F 220/06 (2006.01); C07F 9/92 (2006.01); C07F 9/09 (2006.01);
U.S. Cl.
CPC ...
C07F 9/94 (2013.01); C07F 9/09 (2013.01); C07F 9/92 (2013.01); C08F 212/08 (2013.01); C08F 220/06 (2013.01);
Abstract
A bismuth compound which is little toxic, insoluble in a monomer, usable for optical purpose and used as a substitute for a lead compound, in which a phosphoric acid ester having a (meth)acrylic group(s) is bonded to bismuth, and a method of producing the bismuth compound by reacting bismuth (meth)acrylate or bismuth subsalicylate with a phosphoric acid ester having a (meth)acrylic group(s) and carrying out dehydration.