Monostable valve
CA 2279830 C · Owner: Simoens, Herve · Inventors: Simoens, Herve
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a monostable valve for controlling the sudden discharge of a gas contained in an enclosure. Said valve is characterised in that it comprises: on a so-called control conduit (17) a second shutter (18) between a so-called closing position wherein the gas contained in the control chamber (13) cannot escape and a so-called discharge position wherein the gas contained in the control chamber can escape; drive means (19) for rapidly moving the control shutter in its discharging position; and means (20) for returning the control shutter in its closing position respectively. Moreover the area defined by the cross-section of the discharge conduit (11) is at least constant even …
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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 December 17, 1998 and granted May 6, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 17, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2020.
- 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.