Pneumatic tire for motor vehicles
CA 1095822 A · Owner: Societa Pneumatici Pirelli S.P.A. · Inventors: Mezzanotte, Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pneumatic tire for a motor vehicle has a tread divided into first and second annular contiguous zones or portions. The first zone is free from annular grooves and has a substantially smooth surface with circumferentially spaced generally laterally extending short cuts or grooves inclined with respect to the circumferential line of the tire. The elastomer in the composition forming the first zone has a second order glass transition temperature of from -10°C. to -25°C. The second zone has laterally spaced annular grooves and transverse grooves forming a tread pattern. The elastomeric composition of the second zone contains an elastomer having a second order glass transition temperature of …
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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
- Granted February 17, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 17, 1998.
- 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.