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:
Feb. 07, 2006
Filed:
Feb. 06, 2003
Applicants:
Tsuyoshi Okubo, Tokyo, JP;
Ken Takamatsu, Tokyo, JP;
Inventors:
Tsuyoshi Okubo, Tokyo, JP;
Ken Takamatsu, Tokyo, JP;
Assignee:
Hoya Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D 339/00 (2006.01); C07D 327/06 (2006.01); C07D 327/10 (2006.01); C07D 341/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A compound capable of giving optical materials that may be high in both refractive index and Abbe's number and may be excellent in heat resistance and transparency, and a process that may produce the same with good efficiency are disclosed. The compound may be a cyclic disulfide compound including a structure represented by the following general formula (1) or (2) and having a sulfur content of from 50 to 85% by weight:wherein X represents a chain having carbon and/or sulfur as a skeleton, inclusive of cyclic ones; and the number of elements constituting X is from 1 to 4.