Method and compositions for manufacturing coated photochromatic articles
CA 2337124 A1 · Owner: Optical Molding Systems, Inc. · Inventors: Wires, Duane L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for making a lens includes a front mold (90) which has a reflective, UV absorptive surface, a back mold (50) which is UV light transmissive and a gasket (60) which holds the molds and defines a lens forming cavity (78) therebetween which receives polymerizable resin material (130). The resin (130) in the lens forming cavity (78) is exposed to a source of UV light (20) to cure the resin (130) and form the lens. Photochromatic coatings can be applied to the lens and cured.
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 July 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2021.
- 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.