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Expired Canadian patentCanada

Mass air flow sensor

CA 1204301 A · Owner: Ford Motor Company Of Canada, Limited · Inventors: Blechinger, Chester J.

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 heated element mass air flow meter 10 includes a cylinder 20 having a surface 21 with an area of stagnation 22. Element 11 is positioned aft of area of stagnation 22 and forward of a downstream area of turbulence 23. Deposition of air born dirt takes places at the stagnation area because dirt particles have a greater density and inertia than air and cannot turn as easily. The air passing the element has been substantially separted from air born dirt and carries less dirt than the remainder of the air stream. The accuracy of heated element meters is reduced by deposition of dirt on the element. A configuration as described reduces the amount of dirt striking the heated element 11 and …

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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 May 13, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 8, 1983
GrantedMay 13, 1986
Term endedMay 13, 2003
Patent numberCA 1204301 A
Classification (IPC)G01F1/56 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedApril 8, 1983Patent grantedMay 13, 1986Term endedMay 13, 2003

Sources & verification

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