Patent · US Active

Method for making contact lenses

US7780879B2 · kind B2 · utility

16Cited by

66References

14Claims

0Family size

Assignee

Novartis AG · CH

Inventors

John Dallas Pruitt · Suwanee, US
Lynn Cook Winterton · Roswell, US
Bernhard Seiferling · Goldbach, DE
Juergen Vogt · Eindhoven, NL
Harald Bothe · Niedernhausen, DE

Key dates

Filing date	Dec 18, 2008
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Dec 18, 2028

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB29C33/60
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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 phospholipid into a fluid composition including a lens-forming material in an amount sufficient to reduce an averaged mold separation force by at least about 40% in comparison with that without the phospholipids.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.