Method for controlling a dispensing device for supplying a gaseous fluid to a space, assembly for implementing same, and device provided therewith
CA 2176394 C · Owner: Societe Financiere De Gestion · Inventors: Simoens, Herve
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for controlling a dispensing device (1) for supplying a gaseous fluid (3) to a space (2) and abruptly emptying said space (2) to deliver its contents to an apparatus (4) once the supply has been cut off. The method is characterised in that to reduce the fluid pressure in a supply chamber of the device and cause a sealing member to open abruptly once the supply of pressurised fluid (3) to the device (1) has been cut off rather than discharging to the atmosphere the pressurised fluid (3) in the supply chamber (5) and that part of the supply circuit between said chamber (5) and the cut-off assembly said pressurised fluid (3) which previously held the sealing member against a seal seat …
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 November 10, 1994 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2016.
- 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.