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Expired Canadian patentCanada

Ultrasonic channel diffuser, particularly radial one and method of manufacture of ultrasonic channel diffuser, particularly radial one

CA 1237371 A · Owner: Instytut Lotnictwa · Inventors: Traczyk, Jan; Brejnak, Jacek; Kawalec, Krzysztof

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

A supersonic diffuser consisting of a ring with equally spaced channels shaped by inter-channel walls permanently connected to at least one side wall of the diffuser. On the inlet side of the diffuser there are inter-channel walls converging towards the axis of the diffuser ring. On the side of the inside diameter, the diffuser has removable side walls which can be provided with sharply terminated partial vanes. And a method of manufacture of such supersonic diffuser, wherein side convergent surfaces on interchannel walls are made by two surfaces of revolution counterprofiles and co-axial with the axis of the diffuser ring. The surfaces of revolution intersect close to the leading edges of …

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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 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • 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 19, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237371 A
Classification (IPC)B25D17/12 +1 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMarch 19, 1985Patent grantedMay 31, 1988Term endedMay 31, 2005

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