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Expired Canadian patentCanada

Pressurized flotation module and method for pressurized foam separation

CA 1312152 C · Owner: Mccool, Michael A. · Inventors: Mccool, Michael A.; Chamberlin, Jeffrey L.

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 method and several embodiments of apparatus are disclosed for use in foam flotation separation. The method discloses performing the separation in a module operated at nonatmospheric pressure, and the apparatus disclosed are suitable for use as the module of the method. Both the method and the apparatus contemplate positive and negative pressure operation.

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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 December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.
FiledDecember 9, 1987
GrantedDecember 29, 1992
Term endedDecember 29, 2009
Patent numberCA 1312152 C
Classification (IPC)B03D1/14 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 9, 1987Patent grantedDec 29, 1992Term endedDec 29, 2009

Sources & verification

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