Method for treating a lens apt to trimming
US7488509B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 2003 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Mar 17, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Disclosed is a method for treating an ophthalmic lens comprising two main sides, wherein at least one side comprises an organic or mineral external layer coated with a MgF2 temporary protective layer, comprising one of the following treating steps: a liquid phase chemical treatment of the temporary protective layer, leading to the formation of MgO and/or Mg(OH)2 in and/or on the temporary protective layer; or a deposit of at least one non-fluorinated metallic oxide and/or of at least one non fluorinated metallic hydroxide on the temporary protective layer through transfer thereof from an electrostatic film or through vacuum evaporation thereof directly on the temporary protective layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.