Endless power transmission belt construction, cord therefor and methods of making the same
CA 2201465 C · Owner: Dayco Products, Inc. · Inventors: Van Hook, Robert M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An endless power transmission belt construction cord, therefor and methods of making the same are provided the cord, having the yarns and the plies thereof respectively twisted on a 2 for 1 twister so as to cause the longitudinal axes of the fiber filaments to be disposed generally in the longitudinal direction of the cord with the denier of the fiber filaments of each yarn being approximately 1500. The twist multiplier of the three plies is 3.7687 as the plies are twisted together at a rate of approximately 2.9 turns per linear inch of the cord, and the twist multiplier for the two yarns is 3.6765 as the two yarns for each ply are twisted together at a rate of approximately 4.9 turns per …
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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 April 1, 1997 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 1, 2019.
- 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.