A tread for retreading tires
CA 2402494 A1 · Owner: Dresch, Eldon · Inventors: Dresch, Eldon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tread for retreading tires, having an external face (21) provided with the usual grooves (23) and an internal face (22) to be seated and adhered usually , by vulcanization, to the convex external face (11) of a tire carcass (10) from which the compound of the original tread has been totally abraded said , tread (20) presenting a thickness that varies throughout the width thereof having its internal face (22) defined in a concave arc with the radius of , curvature corresponding to that of the external face (11) of the tire carcass (10) and with its external face (21) being flat or slightly convex with the , radius of curvature substantially larger than that of its internal face (22).
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 April 4, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 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.