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:
Nov. 30, 1982
Filed:
Nov. 29, 1979
Applicant:
Inventors:
Ivor B Atkinson, Chessington, GB;
Barry C Holdstock, Morden, GB;
Assignee:
Global Vision (U.K.) Ltd., Hants, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C / ;
U.S. Cl.
CPC ...
523106 ; 525302 ; 525313 ; 526317 ; 5263231 ; 526336 ;
Abstract
The invention relates to soft contact lenses having a water content of at least about 45% and comprising a hydrated copolymer of a major proportion of an hydroxyalkyl acrylate or methacrylate, up to 12% by weight of an ethylenically unsaturated acid or anhydride, a minor proportion of a cross-linking monomer and a minor proportion of styrene or a substituted styrene, the free acid or anhydride groups being in salt form.
Atkinson, Ivor. (1982). Cross-linked hydrogel copolymers for contact lenses (U.S. Patent No. 4361657). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4361657
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile