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. 06, 2008
Filed:
Apr. 12, 2005
Applicants:
Yukio Kokuzawa, Kanagawa, JP;
Katsuyuki Murai, Kanagawa, JP;
Shinpei Arita, Tochigi, JP;
Inventors:
Assignees:
Mitsubishi Gas Chemical Company Inc., Tokyo, JP;
Japan Acryace Corporation, Tokyo, JP;
Arisawa MFG. Co., Ltd., Joetsu-Shi, Nigata, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B 21/60 (2006.01); G03B 21/56 (2006.01);
U.S. Cl.
CPC ...
Abstract
A lens sheet for use as a Fresnel lens sheet or a lenticular lens sheet of rear projection screens, which includes a plastic substrate and a lens element disposed on the plastic substrate. The plastic substrate includes at least a first surface layer, an intermediate layer and a second surface layer. Each of the first surface layer and the second surface layer has a saturated water absorptivity higher than that of the intermediate layer.