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Expired Canadian patentCanada

Reinforcing plies for tires

CA 1314797 C · Owner: Davisson, Jack Arlen · Inventors: Davisson, Jack Arlen

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A radial carcass, belted tire (10) comprises an overlay ply (18) which provides the tire with high speed endurance without adversely affecting the uniformity of the tire. The overlay ply (18) comprises textile reinforcing elements consisting of successively aligned cord sections (21) arranged in parallel rows. Each cord section has a length which is comprised between 1/4 and 1/8 of the corresponding circumferential development of the tire. The cord sections (21) in each row have substantially equal length and are separated by interruptions (22) of a width such that the total width of the interruptions per circumferentially extending row of cords is less than 4% of the corresponding …

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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 March 23, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 23, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 5, 1988
GrantedMarch 23, 1993
Term endedMarch 23, 2010
Patent numberCA 1314797 C
Classification (IPC)B60C9/20 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedApril 5, 1988Patent grantedMarch 23, 1993Term endedMarch 23, 2010

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.