Patent · US Active

Lens apt to trimming

US8272736B2 · kind B2 · utility

0Cited by

32References

11Claims

0Family size

Assignee

Essilor International (Compagnie Generale d'Optique) · FR

Inventors

Pascale Lacan · Paris, FR
Dominique Conte · Charenton-le-Pont, FR

Key dates

Filing date	Dec 22, 2008
Grant date	Sep 25, 2012
Priority date	—
Expiry date	Feb 21, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/265
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

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, said method comprising the specific treating step of depositing the MgF2 temporary protective layer on the external layer through vacuum evaporation at a speed lower than or equal to 0.5 nm/s. The lens obtained from the above method is capable of being submitted to a trimming operation within 48 hours after the ophthalmic lens has been treated, i.e. after the various layers have been deposited.

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