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:
Nov. 08, 2011
Applicants:
Troy Vernon Holland, Suwanee, GA (US);
Dawn Alison Smith, Rotorua, NZ;
Inventors:
Troy Vernon Holland, Suwanee, GA (US);
Dawn Alison Smith, Rotorua, NZ;
Assignee:
Novartis AG, Basel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D 11/00 (2006.01); C08L 39/00 (2006.01); C08L 39/04 (2006.01); G02B 1/04 (2006.01);
U.S. Cl.
CPC ...
B29D 11/00192 (2013.01); C08L 39/04 (2013.01); G02B 1/043 (2013.01);
Abstract
The instant invention pertains to a method and a fluid composition for producing contact lenses with improved lens quality and with increased product yield. The method of the invention involves adding a Butylated Polyvinylpyrrolidone into a fluid composition including a lens-forming material in an amount sufficient to reduce an averaged mold separation force by at least about 20% in comparison with that without the Butylated Polyvinylpyrrolidone.