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. 28, 2012
Filed:
Jan. 22, 2007
Applicants:
Shinobu Izumi, Shunan, JP;
Junji Takenaka, Shunan, JP;
Inventors:
Shinobu Izumi, Shunan, JP;
Junji Takenaka, Shunan, JP;
Assignee:
Tokuyama Corporation, Shunan-Shi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/23 (2006.01); C09B 56/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a chromene compound represented by the following formula (1), wherein R, R, Rand Rare, respectively, hydrogen atoms, alkyl groups, aryl groups, or the like groups under a condition that at least two of Rto Rare not hydrogen atoms, R, R, Rand Rare, respectively, alkyl groups, aryl groups or the like groups, m and n are, respectively, integers of 0 to 4, and x and y are, respectively, integers of 0 to 5.