Expired Canadian patentCanada
Pressure-reducing, noise-abating control valve
CA 2011405 C · Owner: Red Valve Company, Inc. · Inventors: Raftis, Spiros G.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A control valve has a plurality of internal flow channels operative for reducing the pressure and attenuating the noise of pressurized fluids being conveyed along a pipe line. An entrance well within the valve minimizes excess turbulence.
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 March 2, 1990 and granted December 17, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 2, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 2, 1990
GrantedDecember 17, 1996
Term endedMarch 2, 2010
Patent numberCA 2011405 C
Classification (IPC)F16K47/02 +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.