Tire with rubber tread of circumferential zones with graduated physical properties
CA 2491190 C · Owner: Puhala, Aaron Scott · Inventors: Bezilla, Bernard Matthew, Jr.; Puhala, Aaron Scott; Losey, Robert Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a tire having a rubber tread comprised of cap/base construction where the tread cap layer provides the running surface of the tread and the tread base layer underlies the tread cap layer and thereby provides a transition between the tread cap layer and the tire carcass. For this invention the tread cap layer is comprised of a plurality of individual circumferential load-bearing zones of rubber compositions which exhibit graduated physical properties and which extend from the outer running surface of the tread cap layer radially inward to said tread base layer. In one aspect the zoned rubber tread cap layer and rubber tread base layer are co-extruded together to form …
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 29, 2004 and granted February 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 29, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.