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Expired Canadian patentCanada

Method and appliance for evaluating the sound emission property of hollow components and their use particularly in the motor-vehicle industry

CA 1285061 C · Owner: Vera, Jean-Claude · Inventors: Vera, Jean-Claude

CIPO record

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

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Abstract From the Canadian patent

Method and appliance for evaluating the sound emission property of hollow components and their use particularly in the motor-vehicle industry. The proposed technique makes use of a non-deformable sealed tank of specific volume, a pressurized-fluid supply equipped with a connector intended to be connected to an orifice in the hollow component, a liquid delivery for filling and emptying the tank, once the component has been submerged in it and a, sensor for detecting the variation in volume of the liquid in the tank resulting from the deformations of the casing of the component which are caused by the set pressure of the fluid prevailing in it. The invention is used to assess the probable …

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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 June 18, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 18, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 1987
GrantedJune 18, 1991
Term endedJune 18, 2008
Patent numberCA 1285061 C
Classification (IPC)G01H17/00

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedDec 10, 1987Patent grantedJune 18, 1991Term endedJune 18, 2008

Sources & verification

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