Expired Canadian patentCanada
Quick repair check valve
CA 1162820 A · Owner: Mattoon, Roland W. · Inventors: Mattoon, Roland W.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Flow control devices, particularly heavy duty valve assemblies, in which the valve seat and the valve means can be replaced without dislocating the pipes leading to and away from the valve and which can easily be installed into an existing pipe line.
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 28, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2001.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 14, 1981
GrantedFebruary 28, 1984
Term endedFebruary 28, 2001
Patent numberCA 1162820 A
Classification (IPC)F16K15/00 +2 more
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.