Protective eyeglass assembly
CA 2190875 C · Owner: Stepan, Walter · Inventors: Stepan, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A protective eyeglass assembly includes a frame having left and right lens frame portions lens receiving, apertures in the frame portions a central bridge portion, connecting the frame portions and left and right temple, bars. The eyeglass assembly further includes an integrally formed lens piece which is adapted to be detachably secured to the frame so that a user can interchange the frame and/or replace the lens piece. The lens piece includes left and right lens panels a central, bridge portion connecting the lens panels left and right, side shields, and left and right upper shields. The lens piece is received in assembled relation with the frame with the left and right lens panels …
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 November 20, 1996 and granted October 24, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2018.
- 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.