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:
Jan. 10, 1978
Filed:
Dec. 28, 1973
Applicant:
Inventor:
Herman S Schultz, Lexington, MA (US);
Assignee:
Itek Corporation, Lexington, MA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08L / ;
U.S. Cl.
CPC ...
260 / ; 264-1 ; 351160 ; 526303 ; 526916 ;
Abstract
A hydrophilic copolymer of N,N-(C.sub.1 -C.sub.2 alkyl) acrylamide is disclosed. The copolymer is formed by reacting, based on 100 parts, from 20-80 parts of the C.sub.1 -C.sub.2 alkyl substituted acrylamide, 80-20 parts of C.sub.1 -C.sub.4 alkyl acrylates, methacrylates, or combinations, and small amounts of a cross-linking agent. The resulting copolymerization product can be equilibrated with water or other aqueous solutions to form hydrogels useful in forming shaped hydrogel articles. One particular shaped article which can be formed is a hydrophilic contact lens. A process for forming the hydrogels is also disclosed.