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:
Dec. 18, 2007
Filed:
Nov. 07, 2000
Applicants:
Akikazu Amagai, Tokyo, JP;
Yuichi Yoshimura, Mie, JP;
Motoharu Takeuchi, Tokyo, JP;
Atsuki Niimi, Tokyo, JP;
Hiroshi Horikoshi, Chiba, JP;
Masanori Shimuta, Mie, JP;
Nobuyuki Uemura, Osaka, JP;
Inventors:
Akikazu Amagai, Tokyo, JP;
Yuichi Yoshimura, Mie, JP;
Motoharu Takeuchi, Tokyo, JP;
Atsuki Niimi, Tokyo, JP;
Hiroshi Horikoshi, Chiba, JP;
Masanori Shimuta, Mie, JP;
Nobuyuki Uemura, Osaka, JP;
Assignee:
Mitsubishi Gas Chemical Co., Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 331/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
Episulfide compounds useful as starting materials of optical materials are stably stored for a long period of time at a temperature ranging from their solidifying points to 20° C., preventing the production or precipitation of polymers and the yellowing.