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:
Apr. 06, 1976
Filed:
Aug. 07, 1974
Applicant:
Inventors:
Tetsunosuke Kunitomo, Kamakura, JA;
Hideki Kenjo, Yokohama, JA;
Syoji Nagaoka, Kamakura, JA;
Takeshi Yoshioka, Kamakura, JA;
Hiroshi Tanzawa, Kamakura, JA;
Assignee:
Toray Industries, Inc., Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L / ; C08L / ;
U.S. Cl.
CPC ...
260895 ; 260 / ; 351160 ;
Abstract
Contact lens having high water content make from polymer of cross-link-polymerized N-vinyl pyrrolidone in the presence of water-insoluble polymer has excellent properties suitable for continuous wearing for a long period of time.
Kunitomo, Tetsunosuke. (1976). Cross-linked n-vinyl pyrrolidone polymer composition suitable for (U.S. Patent No. 3949021). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/3949021
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile