Methods for making toothed belt construction
CA 2062775 C · Owner: Dayco Products, Inc. · Inventors: Thomas, Danny L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improvement is provided in a method of making a toothed belt construction that has a toothed surface means and that comprises a belt sleeve from which individual endless belts are subsequently cut in a conventional manner the belt, sleeve having a preformed fabric means lining the toothed surface. The method includes the first step of forming the preformed fabric to have serially disposed tooth-shaped projections throughout its length so as to line the toothed surface thereof. The fabric is disposed onto an externally toothed cylindrical mould member used to form the belt sleeve. The belt sleeve is formed on the mould member with material so that the fabric forms part of the belt sleeve …
Read the whole patent
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 July 20, 1990 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2012.
- 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.