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Expired Canadian patentCanada

Repelling-action filter unit and assembly

CA 1237677 A · Owner: Parker, Michael James · Inventors: Stone, Walter H.; Schaupp, Richard E.; Church, John F.

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 filter assembly and associated filter unit includes a repelling-action filter media for use in vacuum or suction side fuel filter applications. In particular, the filter unit is a screw on unit with centrally located threads at opposite ends of the filter unit and with a specifically designed end cap allowing use of the filter unit with a dual zone collection bowl normally used for coalescing pressure side filter applications The end cap includes holes which allow use of both of the collection zones in spite of the normal isolation between the collection zones.

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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 June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 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.
FiledJune 19, 1985
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237677 A
Classification (IPC)B01D17/02 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 19, 1985Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

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