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. 18, 2017
Filed:
Mar. 14, 2014
Applicant:
Coopervision International Holding Company, Lp, St. Michael, BB;
Inventors:
Yuwen Liu, Dublin, CA (US);
AKM Shahab Siddiqui, Pleasanton, CA (US);
Yuan Ji, San Jose, CA (US);
Junhao Ge, Fremont, CA (US);
Assignee:
CooperVision International Holding Company, LP, St. Michael, BB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L 83/06 (2006.01); G02B 1/04 (2006.01); B29D 11/00 (2006.01);
U.S. Cl.
CPC ...
G02B 1/043 (2013.01); B29D 11/0025 (2013.01); B29D 11/00192 (2013.01); C08L 83/06 (2013.01);
Abstract
A method is provided for manufacturing ophthalmically-acceptable, distortion-free silicone hydrogel contact lenses without the use of volatile organic solvents in the manufacturing process. The contact lenses are extract with an extraction liquid comprising an aqueous solution of a non-volatile organic solvent, such as ethyl lactate.