Pneumatic tires
CA 1071986 A · Owner: Michelin & Cie (Compangie Generale Des Etablissements Michelin) · Inventors: Devaux, Edmond-Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tire comprising a radial carcass reinforcement and a tread reinforcement imparting to the tread a meridian curvature less than the circumferential curvature is improved by having the percentage of sculpting of the tread increase from the edges of the tread in the direction towards the equatorial zone of the tread.
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
- Granted February 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 1997.
- 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.