Valve casing for use in a butterfly valve
CA 1250274 A · Owner: Kurimoto Ltd. · Inventors: Miyake, Katsunobu; Horii, Hiroshi; Ikoma, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the valve casing according to the invention a, cylindrical elastic member is fitted to coat solidly the whole inner surface of the valve casing to form a passage while performing a function as a seal ring for pipe lines and a function as a seal ring for a valve disk. -17-
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
- Granted February 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 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.
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.