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:
Jul. 26, 1983
Filed:
Nov. 16, 1981
Applicant:
Inventors:
Joseph W Wittmann, Rochester, NY (US);
John M Evans, Rochester, NY (US);
Assignee:
UCO Optics, Inc., Rochester, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08L / ; G03B / ;
U.S. Cl.
CPC ...
523107 ; 525937 ; 527311 ; 527313 ; 528 32 ; 528 33 ; 528 43 ; 3511 / ; 3511 / ;
Abstract
Cellulose esters are cured by exposure to radiation preferably followed by exposure to elevated temperatures of at least about 100.degree. C. In addition, polymers obtained from reacting certain cellulose esters with certain polymerizable silicon esters are provided. The cured cellulose esters are suitable for producing transparent parts such as contact lenses.