Tire rubber composition
CA 2250273 A1 · Owner: Morizono, Kenichi · Inventors: Matsumoto, Tetsuhiro; Takimoto, Kazuyuki; Kawasaki, Masaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A rubber composition for tire sidewalls excellent in strength characteristics and resistance to fatigue from flexing and capable of giving fuel-saving tire sidewalls, which comprises (A) an unsaturated olefin copolymer prepared from (i) ethylene, (ii) an aromatic vinyl compound (iii) a non-conjugated polyene , and, if necessary (iv) an .alpha.-olefin having 3 or more carbon atoms and having a (i) to (iv) molar ratio ranging from 100/0 to 40/60 a (i) + (iv) , to (ii) molar ratio ranging from 98/2 to 60/40 an intrinsic viscosity âµ , of 1.0 to 6.0 dl/g as determined at 135 ~C in decalin and an iodine value of , 10 to 50 and (B) a diene rubber. A rubber composition for tire treads capable …
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 January 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 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.
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.