Electrically conductive tyre and apparatus for extruding sections made conductive
CA 2321910 A1 · Owner: Calvar, Didier · Inventors: Nicolas, Serge; Calvar, Didier; Bardy, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a tyre comprising a tyre tread (3) made up of two non-conductive layers (31 32), each layer (31, 32) contains a circumferential insert (11 12) of conductive mixture, at least one of the layers being provided with an insert having, viewed in transverse cross-section a surface S with two bases and whereof the first base on the contact wall (310) between the two parts has a width E not less than 10 times the first base width e' on said surface (310) of the insert (11 12) surface S' of the second layer (31 32), said first bases being on the common contact wall (310) opposite each other. The invention also concerns an apparatus for extruding a layer provided with a …
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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 February 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2021.
- 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.