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. 11, 1999
Filed:
Feb. 04, 1998
Tsutomu Yamashita, Kyoto, JP;
Michiharu Okubo, Kyoto, JP;
Makoto Honda, Tokyo, JP;
Futoshi Osawa, Tokyo, JP;
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Dainippon Printing Co., Ltd., Tokyo, JP;
Abstract
UV-curable Fresnel lens resin compositions �a! comprising a (meth)acrylate containing hydroxyl group and aromatic ring (A1), a urethane group-contining (meth) acrylate (A2) comprising an aromatic diol, an aromatic ringcontaining monofunctional (meth)acrylate (A3), and a photopolymerization initiator (B) and �1b! comprising (A1), a mono- or di(meth)acrylate monomer (A4), and (B), further supplemented with a polyester (C1) comprising an aromatic diol and a phosphate (C2) for the formation of a Fresnel lens on a sheet or plate made of a methyl methacrylate (co) polymer; a Fresnel lens formed by UV cure of composition �1a! or �1b!; and a rear projection screen including a sheet or plate carrying said Fresnel lens. The Fresnel lens has high refractive index, antistatic properties and is satisfactory in adhesion-to a sheet or plate.