Lens overlays for eyewear
CA 2378602 A1 · Owner: Metcalfe, Richard T. · Inventors: Metcalfe, Richard T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In general terms, the lens overlays of the present invention comprise thin formed plastic overlays that can easily be attached to the inside or outside of the primary protective lenses by the user. In one embodiment the lens , overlay comprises a first overlay to be disposed on the left side lens and a second overlay to be disposed on the right side lens. In another embodiment the lens overlay comprises a one piece conforming overlay lens that is attached to the front face of the primary lens by removing the frame bridge slipping the frame temples through a left and right hole in the endpieces of the overlay and snapping the bridge back onto the frame to secure the overlay to the front …
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 June 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2022.
- 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.