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Expired Canadian patentCanada

Aminomethylenephosphonate compositions

CA 1292866 C · Owner: Monsanto Europe S.A. · Inventors: Vandenbulcke, Brigitte Marie Judith; May, Bronislav Henri

CIPO record

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Abstract From the Canadian patent

Abstract, Granular or powder compositions containing diethylenetriaminepenta(methylenephosphonic acid) and/or its salts in admixture with sodium sulphate and/or bisulphate in an amount expressed as, the equivalent amount of anhydrous sodium sulphate of at least, 60% of the dry weight of the diethylenetriaminepenta(methylenephosphonic acid) and/or its salts can be stored for extended periods while remaining in the form of free-flowing solids.

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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 10, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 28, 1986
GrantedDecember 10, 1991
Term endedDecember 10, 2008
Patent numberCA 1292866 C
Classification (IPC)C02F5/14 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedNov 28, 1986Patent grantedDec 10, 1991Term endedDec 10, 2008

Sources & verification

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