Pulley and manufacturing method of the same
CA 2225772 A1 · Owner: Ohya, Masakiyo · Inventors: Ohya, Masakiyo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A web section extends from a central portion in an axial direction of an inner cylindrical section, an outer cylindrical section is formed at an outer circumferential portion of hte web section, coaxially with respect to the inner cylindrical section about the web section, and V-shaped grooves are formed on an outer circumference of the outer cylindrical section, integrally by a cold working.
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 December 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 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.