Tire and support
CA 2448773 A1 · Owner: Grah, Michael D. · Inventors: Grah, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A support (1) according to the invention comprises a rubber article. The support comprises: a substantially cylindrical base (2) which conforms to the wheel rim; a substantially cylindrical crown (3) which comes into contact with the inside of the tire summit in the event of a drop in inflation pressure but to leave a clearance relative to the summit at nominal inflation pressure and an annular body (4) connecting the base to the crown. The rubber article comprises a rubber, preferably a mix of natural rubber and polybutadiene a , metal salt of a carboxylic acid, preferably zinc dimethacrylate and effective , amount of carbon black or silica or both, and a peroxide for curing of said …
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 May 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2024.
- 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.