Aliphatic thermoplastic poyurethane press-on lenses and eyeglasses embodying the same
CA 2177715 A1 · Owner: Neoptx Inc. · Inventors: La Haye, Peter G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Self-stick or press-on magnifying or corrective optical lenses or optical elements (10 20, 30) which, are injection-molded from an aliphatic thermoplastic polyurethane may be securely but releasably secured by their inherent molecular surface-adhesion characteristics to the surface of a sunglass or plano lens (12 22, 32) by, finger pressure alone to readily provide a magnifying or collective lens suitable for incorporation into the frame of a normal pair of sunglasses or plano eyeglasses (14 24).
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 December 7, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2016.
- 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.