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Expired Canadian patentCanada

Inlet for cyclone-type particulate matter gas separator device

CA 1085321 A · Owner: American Air Filter Company, Inc. · Inventors: Dahlem, Francis E.

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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 dirty gas inlet configuration for a cyclone-type particulate matter gas separator device has two annular concentrically disposed converging dirty gas channels. The outer annular channel has a plurality of gas flow directing vanes disposed therein to impart a spinning or whirling motion to a dirty gas stream passing into the separator device through the outer annular channel from outside the separator device. The inner annular channel has an adjustable dirty gas inlet for varying the volume rate of flow of dirty gas passing into the separator device through the inner annular channel from outside the separator device. The dirty gas streams exiting the outer and inner annular converging …

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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 September 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 13, 1977
GrantedSeptember 9, 1980
Term endedSeptember 9, 1997
Patent numberCA 1085321 A
Classification (IPC)B04C3/06 +1 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedJune 13, 1977Patent grantedSep 9, 1980Term endedSep 9, 1997

Sources & verification

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