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Expired Canadian patentCanada

A method and apparatus for the continuous gravimetric metering of flowing materials for burner systems

CA 2534862 C · Owner: Pfister Gmbh · Inventors: Wolfschaffner, Hubert

CIPO record

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Abstract From the Canadian patent

According to the invention, a method for the continuous gravimetric metering of flowing materials for burner systems in which the instantaneous mass flow , is determined and metering occurs by means of a metering unit (8) can be , achieved by means of determination of the type of flowing material. The instantaneous heat output for the flowing material is determined from the type of flowing material and the heat capacity thereof and the mass flow determination. The output from the metering device (8) is regulated to match the set feed rate, depending on the instantaneous heat output. Also disclosed is a corresponding device (1), for the continuous gravimetric metering of flowing …

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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 July 4, 2004 and granted February 11, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 4, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 4, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 4, 2004
GrantedFebruary 11, 2014
Term endedJuly 4, 2024
Patent numberCA 2534862 C
Classification (IPC)G01G11/08

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedJuly 4, 2004Patent grantedFeb 11, 2014Term endedJuly 4, 2024

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