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, 1995
Filed:
Nov. 09, 1993
Applicant:
Inventors:
Jiri Sulc, Centerport, NY (US);
Zuzana Krcova, East Northport, NY (US);
Patrick Chen, Edison, NJ (US);
Qi-Bin Bao, Livingston, NJ (US);
Assignees:
Hydron Limited, Hants, GB;
Ceskoslovenska akademie ved., Prague, CS;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526265 ; 526278 ; 526287 ; 526288 ; 526310 ; 526312 ; 3511 / ;
Abstract
A water swellable crosslinked polymer of essentially balanced charge is obtained by polymerizing a polymer-forming composition comprising a cationic-anionic pair of ethylenically unsaturated monomers and a non-ionic ethylenically unsaturated hydrophilic and/or hydrophobic monomer. Contact lenses formed from the polymer exhibit little if any tendency to attract soils, e.g., proteinaceous debris, to their surfaces.