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:
May. 20, 2008
Filed:
Mar. 10, 2003
Hideki Hirata, Tokyo, JP;
Tsuyoshi Komaki, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Juichi Fujimoto, Aichi, JP;
Kouji Hayama, Aichi, JP;
Hideki Hirata, Tokyo, JP;
Tsuyoshi Komaki, Tokyo, JP;
Tomoki Ushida, Tokyo, JP;
Juichi Fujimoto, Aichi, JP;
Kouji Hayama, Aichi, JP;
TDK Corporation, Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
An optical information medium having a light transmission layer obtained by curing a composition containing a urethane di(meth)acrylate (A) of the formula (I) and the other urethane di(meth)acrylate (B), and having a tensile elastic modulus of 600 to 1300 MPa at 25° C. and a light transmittance of 80% or more at wavelength of 400 nm (in the formula, R=an alicyclic diisocyanate residue, R=an alkylene group or an organic group containing a cycloalkyl group or ester bond, R=H or methyl group.):