Tire treads
CA 2024231 C · Owner: The Goodyear Tire & Rubber Company · Inventors: Maitre, Bruno Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tire tread of elastomeric material formed into ground engaging elements (1) is provided with sipes (2) in said elements. The sipes are in the form of incisions. A first incision portion(s) extends inwardly from the tread surface and then splits into at least two incision portions (3,4) which continueto extend away from the tread surface while at the same time diverging apart from one another. In one embodiment one of the incision portions splits up into two incision portions diverging apart from each other and extending away from the tread surface.
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 August 29, 1990 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 29, 2012.
- 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.