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. 17, 2009
Filed:
Dec. 03, 2003
Applicants:
Tatsuya Hirono, Tokyo, JP;
Masayuki Sekiguchi, Tokyo, JP;
Inventors:
Tatsuya Hirono, Tokyo, JP;
Masayuki Sekiguchi, Tokyo, JP;
Assignee:
JSR Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B 27/00 (2006.01); B32B 27/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A wavelength plate, which comprises a cyclic olefin based resin-containing material and is obtained by combining plural sheets of a retardation film that provides a specific retardation. The resulting wavelength plate (retardation plate) has the same polarizing characteristics against monochromic lights having a different wavelength and can be used as a wavelength plate for optical information recording and reproducing devices.