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:
Feb. 21, 1984
Filed:
Jan. 21, 1983
Applicant:
Inventors:
Assignees:
Shin-Etsu Chemical Co., Ltd., both of, JP;
Toyo Contact Lens Co., Ltd., both of, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526279 ; 523107 ; 528 32 ; 3511 / ; 3511 / ;
Abstract
An oxygen permeable hard contact lens having an improved oxygen permeability and an improved fragility as well as excellent hardness and rigidity, made of a copolymer comprising an organosilane or organosiloxane having in one molecule at least one group of the general formula (I): ##STR1## wherein R.sup.1 is hydrogen atom or methyl group, k is 0 or 1, and l is 1 or 3, and having at most 16 silicon atoms, and a fluoroalkyl acrylate or methacrylate of the general formula (II): ##STR2## wherein R.sup.1 is as defined above, m is 0 or 1, n is 0 or an integer of 1 to 3, and R.sub.f is a straight or branched fluoroalkyl group having 2 to 21 fluorine atoms.