Expired Canadian patentCanada
Tire components containing functionalized polyolefins
CA 2257002 C · Owner: Bridgestone Corporation · Inventors: Lin, Chen-Chy
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tire having improved tear strength including at least one component comprising: a vulcanized elastomer; and up to about 35 parts by weight functionalized polyolefin per one hundred parts by weight rubber.
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 21, 1998 and granted March 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 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.
FiledDecember 21, 1998
GrantedMarch 15, 2011
Term endedDecember 21, 2018
Patent numberCA 2257002 C
Classification (IPC)C08L21/00 +2 more
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.