Plastic control valve
CA 2062790 C · Owner: Entegris, Inc. · Inventors: Linder, James C.; Mckenzie, Jeffrey J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A free draining, corrosive resistant valve for regulating the flow of corrosive fluids therethrough includes a plastic valve housing (10). An inlet passage (16) extends into the housing and upwardly therein terminating in a valve seat (20). An inclined panel (24) surrounds the inlet passage below the valve seat. An outlet passage (26) extends from the lowermost portion of the inclined panel through the housing. A plastic valve poppet (46) is located above the seat having a diaphragm (52) therearound with an upwardly extending stem (56). A plastic retainer (58) is located above the diaphragm into which the stem extends. The retainer is adapted for affixing the diaphragm in a sealing …
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 October 10, 1990 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 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.
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.