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. 07, 1986
Filed:
May. 13, 1985
Applicant:
Inventor:
Billy T Upchurch, Norfolk, VA (US);
Assignee:
GBF, Inc., Virginia Beach, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08J / ; C08L / ; C08L / ; G02C / ;
U.S. Cl.
CPC ...
522 60 ; 3511 / ; 522 62 ; 522 99 ; 522172 ; 523107 ; 525100 ; 526279 ; 528 26 ;
Abstract
A process of preparing a new contact lens material that is gas permeable, surface wettable, and relatively hard is disclosed. Also disclosed are contact lenses made of this new material, which are comfortable to wear. The new contact lens material is the copolymerization product of a reaction mixture comprising: (1) styrene or a ring substituted styrene; (2) a vinyl alcohol ester such as vinyl acetate; (3) a polyethylene glycol ester such as pentaethyleneglycol monomethacrylate; (4) a substituted polysiloxane such as dimethyl polysiloxane or a substituted silane; and, optionally, (5) a cross-linking agent such as divinyl benzene.