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Expired Canadian patentCanada

Double-acting power transmission belt

CA 1263040 C · Owner: The Gates Rubber Company · Inventors: Skura, William A.; Sloniewksy, Alexander R.

CIPO record

Overview

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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 double acting power transmission belt having a plurality of elastomeric teeth positioned along both its inner and its outer peripheral surfaces each such tooth, possessing a certain spring rate and inner and outer, jackets, respectively formed over the teeth and over the, land portions between the teeth at each of the inner and outer peripheral surfaces, said inner jacket cooperating with the associated teeth such that the spring rate of each jacketed tooth on the inner one of the peripheral surfaces is from 1.2 times to 3 times the spring rate of a corresponding non-jacketed tooth.

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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 November 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 21, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 15, 1986
GrantedNovember 21, 1989
Term endedNovember 21, 2006
Patent numberCA 1263040 C
Classification (IPC)F16G1/28 +1 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedAug 15, 1986Patent grantedNov 21, 1989Term endedNov 21, 2006

Sources & verification

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