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Expired Canadian patentCanada

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

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract 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 …

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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 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.
FiledNovember 10, 1994
GrantedFebruary 26, 2002
Term endedNovember 10, 2014
Patent numberCA 2176394 C
Classification (IPC)B65D88/64 +2 more

Timeline

Timeline From CIPO dates

1995199719992001200320052007200920112013Application filedNov 10, 1994Patent grantedFeb 26, 2002Term endedNov 10, 2014

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.