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Expired Canadian patentCanada

Method and apparatus for optical measurement of fluid flow

CA 1251946 A · Owner: Mtu Motoren- Und Turbinen-Union Munchen Gmbh · Inventors: Hofmann, Jorg; Ding, Kurt

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Abstract From the Canadian patent

A b s t r a c t, Title: Method and Apparatus for optical measurement of fluid flow, Particles injected into the fluid flow permits accurate, velocity measurements thereof between two parallel (focussed laser) beams in measuring windows (multi-windowing) and to get a velocity profile. A laser velocimeter was known per se. Advantage: Better R & D of compressor vanes. Invention: The invention relates to an improvement in data gathering and processing (multi-windowing with a common standard)

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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 April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
  • 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 16, 1984
GrantedApril 4, 1989
Term endedApril 4, 2006
Patent numberCA 1251946 A
Classification (IPC)G01N21/85 +2 more

Timeline

Timeline From CIPO dates

19851988199119941997200020032006Application filedNov 16, 1984Patent grantedApril 4, 1989Term endedApril 4, 2006

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