Rubber blend for tire tread compounds
CA 2255876 A1 · Owner: Senyek, Michael Leslie · Inventors: Colvin, Howard Allen; Senyek, Michael Leslie; Futamura, Shingo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a rubber blend that is easily processable and that can be beneficially used in tire tread rubber compositions. This blend offers particular advantages in cases where silica is used as a filler in the blend. This is because it is possible to attain a given level of modulus while employing a much lower level of silica coupling agent. The blends of this invention can also be easily mixed while utilizing a mixing cycle of reduced duration. These rubber blends also offer excellent tire performance characteristics such as good traction, treadwear and rolling resistance. This invention more specifically discloses a rubber blend which is particularly suitable for …
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, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 7, 2020.
- 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.