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:
Dec. 19, 1978
Filed:
Aug. 08, 1977
Louis Plambeck, Jr, Wilmington, DE (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
A contact lens which when saturated with water has oxygen permeability of greater than 500 centibarrers and a receding contact angle with water of less than 35.degree.. The lens is formed of a polymer containing from 20 to 80 weight percent of repeating units of the structure ##STR1## where --R is --H or CH.sub.3 and R.sub.1 contains from 2 to 10 carbon atoms and at least one polar group. In a preferred aspect --R.sub.1 is --CH.sub.2 CH.sub.2 OH or --CH.sub.2 CHOHCH.sub.3. The polymer also contains from 80 to 20 weight percent of repeating units of the structure ##STR2## where --R.sub.2 is --H or --CH.sub.3 and n is 1 to 4.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile