Toothed belt
CA 2107976 C · Owner: Itoh, Yoshinori · Inventors: Itoh, Yoshinori; Fujiwara, Toru
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Resistance to tooth chipping in toothed belt in which rubber teeth are covered by a tooth cloth is improved by providing for residual elongation of the tooth cloth so that it does not float or separate from the rubber teeth when tooth-deforming forces are applied and by providing the tooth cloth with sufficient breaking strength so that the product of its breaking strength and its elongation are at least equal to a specified value.
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 October 7, 1993 and granted August 19, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2015.
- 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.