Couplings for pipe
CA 1292486 C · Owner: Kabushiki Kaisha Riken · Inventors: Okazaki, Takao; Kubota, Misao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a coupling having a first pipe on which one end an diametrically enlarged portion is formed and a second pipe of which one end can be inserted into the elongated portion of the first pipe. As a result a total length of both the pipes can be regulated within the range of an axial length of the enlarged portion of the first pipe.
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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.