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Expired Canadian patentCanada

Method and apparatus for use in separating solids from liquids

CA 1305569 C · Owner: Clitheroe, Jay B. · Inventors: Clitheroe, Jay B.; Peterson, C. Lynn

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

A system for subjecting a slurry containing solids and a liquid and a flocculating agent in a processing chamber to forces to move the slurry, liquid and flocculating agent through the processing chamber from an inlet opening to an outlet opening in turbulent flow along a continuous spiral and circulatory path so as to form the solids into floccules which may be readily separated from the liquid in which they are contained.

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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 July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
  • 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 18, 1986
GrantedJuly 21, 1992
Term endedJuly 21, 2009
Patent numberCA 1305569 C
Classification (IPC)C02F1/52 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedAug 18, 1986Patent grantedJuly 21, 1992Term endedJuly 21, 2009

Sources & verification

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