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:
Jul. 28, 1998
Filed:
Sep. 10, 1996
Applicant:
Inventors:
Ichiro Ando, Nagoya, JP;
Toru Kawaguchi, Nagoya, JP;
Shoji Ichinohe, Gunma-ken, JP;
Toshio Yamazaki, Gunma-ken, JP;
Assignee:
Menicon Co., Ltd., Aichi-ken, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ; C08F / ; C08F / ; C08F / ;
U.S. Cl.
CPC ...
526264 ; 526279 ; 5263031 ; 5263285 ; 526347 ;
Abstract
A water-absorptive soft contact lens material having a high transparency, an excellent flexibility, a high oxygen permeability independent of water content, a high mechanical strength and an adequate hardness, which comprises a copolymer prepared by the polymerization of a monomer mixture comprising an N,N-dialkyl acrylamide or methacrylamide, an N-vinyllactam and a bis(silicon-containing alkyl) fumarate in a specific ratio, and which provides water-absorptive soft contact lenses having excellent properties such as high transparency and high oxygen permeability.