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Expired Canadian patentCanada

Device for metering a gas content of liquid metal and probe used therefor

CA 1330719 C · Owner: Maes, Rudi · Inventors: Plessers, Jacques Joseph; Maes, Rudi

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

The device comprises a probe with a gas supply pipe terminating at the lower end of the probe a gas, collecting portion for collecting the gas bubbling from the supply pipe through the metal, which portion is provided with a diaphragm allowing gas to pass but retaining liquid metal, and a gas discharge pipe connecting over the diaphragm to the gas collecting portion. A gas circuit connects with one end to the gas supply pipe and with its other end to the gas discharge pipe. A gas detector and a pump are mounted in this circuit. A lance through which at least a part of the gas circuit extends, contains the one portion of a quick-acting coupling with two connectable portions,while the probe …

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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

  • Granted July 19, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 19, 2011.
  • 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 17, 1988
GrantedJuly 19, 1994
Term endedJuly 19, 2011
Patent numberCA 1330719 C
Classification (IPC)G01N33/20 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMarch 17, 1988Patent grantedJuly 19, 1994Term endedJuly 19, 2011

Sources & verification

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