Patent · US Active

Biomedical devices having improved surface characteristics

US7566746B2 · kind B2 · utility

20Cited by

15References

5Claims

0Family size

Assignee

Novartis AG · CH

Inventors

Lynn Cook Winterton · Roswell, US
Juergen Vogt · Eindhoven, NL
John Martin Lally · Lilburn, US
Friedrich Stockinger · Hölstein, CH

Key dates

Filing date	Oct 31, 2007
Grant date	Jul 28, 2009
Priority date	—
Expiry date	Oct 31, 2027

Classification

Technology area (CPC G)Physics
CPC primaryG02B1/10
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Biomedical devices, such as ophthalmic lenses, and methods of making such devices having a surface coating including at least one polyionic layer. A preferred method involves spray coating a polycationic material onto a core lens, rinsing and drying the lens, followed by spray coating a polyanionic material, rinsing and drying. The coating process may be applied a plurality of times to achieve a multi-layer coating on the lens surface. A particularly preferred embodiment is a contact lens comprising a highly oxygen permeable hydrophobic core coated with a 5 to 20 bilayers of hydrophilic polyionic materials.

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