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Expired Canadian patentCanada

Apparatus and process to separate and remove extraneous matter from a liquid stream

CA 1331349 C · Owner: Keeter, Kathy Leigh · Inventors: Keeter, Thomas L.; Keeter, Kathy Leigh

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Waste water contaminents are treated and/or removed in a process and a separator that incorporates a hydrocyclone a constrictive collection, passageway for lighter materials to be removed from the water by a skimmer and skimmer ramp that effectively entrap and remove floatable contaminents while clarified water is removed from the separator at a point below the skimmer and above the hydrocyclone.

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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 August 9, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 9, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 25, 1988
GrantedAugust 9, 1994
Term endedAugust 9, 2011
Patent numberCA 1331349 C
Classification (IPC)C02F1/40 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedAug 25, 1988Patent grantedAug 9, 1994Term endedAug 9, 2011

Sources & verification

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