| US 7,566,746 B2 | ||
| Biomedical devices having improved surface characteristics | ||
| Lynn Cook Winterton, Alpharetta, Ga. (US); Juergen Vogt, Fribourg (Switzerland); John Martin Lally, Lilburn, Ga. (US); and Friedrich Stockinger, Courtepin (Switzerland) | ||
| Assigned to Novartis AG, Basel (Switzerland) | ||
| Filed on Oct. 31, 2007, as Appl. No. 11/981,206. | ||
| Application 10/202758 is a division of application No. 09/559945, filed on Apr. 27, 2000, granted, now 6,451,871. | ||
| Application 09/559945 is a division of application No. 09/199609, filed on Nov. 25, 1998, abandoned. | ||
| Application 11/981206 is a continuation of application No. 10/202758, filed on Jul. 24, 2002, granted, now 7,297,725. | ||
| Claims priority of provisional application 60/135513, filed on Jan. 09, 1998. | ||
| Prior Publication US 2008/0129956 A1, Jun. 05, 2008 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G02C 7/04 (2006.01) | ||
| U.S. Cl. 523—107 [523/106; 264/1.7; 361/16 OH] | 5 Claims |
| 1. A contact lens, comprising:
(a) a core material having no theoretical ionic charge and is a fluorine-containing or siloxane-containing polymeric material,
wherein said core material is a copolymerization product of a composition including a silicone-containing monomer or macromer
and a hydrophilic comonomer; and
(b) a surface coating, including at least one layer of a polyanionic material which is non-covalently bonded to the core material
which is not previously treated to increase its surface charge density,
wherein the polyanionic material is selected from the group consisting of polymethacrylic acid, polyacrylic acid, poly(thiophene-3-acetic
acid), poly(4-styrenesulfonic acid), derivatives thereof and mixtures thereof.
|