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:
Oct. 25, 2005
Filed:
Aug. 28, 2003
Koichi Yamaguchi, Takasaki, JP;
Hirofumi Kishita, Takasaki, JP;
Koichi Yamaguchi, Takasaki, JP;
Hirofumi Kishita, Takasaki, JP;
Shin-Etsu Chemical Co., Ltd., Tokyo, JP;
Abstract
A lens including a lens substrate, a surface layer, and a backing member provided beneath the surface layer, in which the backing member may be either the same as the lens substrate or a separate layer from the lens substrate, and wherein the surface layer includes a hydrolysis-condensation product of a perfluoropolyether modified silane with a hydrolysable functional group or a halogen atom X at both terminals, represented by a general formula (1) shown below:(wherein, Rf is a bivalent group with a straight chain perfluoropolyether structure containing no branching, which incorporates a unit represented by a formula —(CFO)— (wherein, k represents an integer from 1 to 6)) is resistant to the adhesion of contaminants to the surface thereof, can be easily wiped to remove any adhered contaminants, provides a slippery surface that is difficult to scratch, and moreover displays excellent durability and is capable of retaining the above properties over extended periods.