Ophthalmic lens finishing
CA 2373106 A1 · Owner: Robert, Anne · Inventors: Tardieu, Pascale; White, Sidney Shaw, Jr.; Johnson, Eric Glen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for finishing the surface of an ophthalmic lens according to a given specification. The inventive method consists in applying on the surface a varnish layer having thickness ranging between about 30 Ra and 800 Ra where Ra is the mean average roughness of said surface to provide it with a polished surface condition. The invention also concerns an installation for implementing said method. The invention is applicable to lenses made of mineral material or organic material.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.