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Expired Canadian patentCanada

Process to improve the removal of suspended solids in leached uranium oreclarification

CA 1309782 C · Owner: Ecc Specialty Chemicals Inc. · Inventors: Danyliw, Brian H.; Mccurdy, John W.

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 PROCESS TO IMPROVE THE REMOVAL OF SUSPENDED SOLIDS IN LEACHED URANIUM ORE CLARIFICATION ABSTRACT OF THE DISCLOSURE:, The present invention is directed to a process to improve the suspended solids removal by the filter cloth used in the clarification of leached uranium ore, comprising contacting the filter cloth with an effective amount of an acrylamide polymer.

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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 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.
FiledApril 23, 1987
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309782 C
Classification (IPC)B01D37/02 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 23, 1987Patent grantedNov 3, 1992Term endedNov 3, 2009

Sources & verification

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