Biomedical devices having improved surface characteristics
US7297725B2 · kind B2 · utility
108Cited by
15References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2002 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Jul 24, 2022 |
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.