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Expired Canadian patentCanada

Method and composition for fertilizing soils to increase the amountof available phosphorus

CA 1308566 C · Owner: Minister Of Agriculture Canada · Inventors: Kucey, Reginald M.N.

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

Abstract:, The invention provides a method and composition for fertilizing soils to increase the amounts of phosphorus available for uptake by plants. The invention involves introducing an inoculum of the fungus Penicillium bilaji into (or onto) the soil in combination with a manufactured phosphorus fertilizer. The fungus has the effect of increasing the amount of phosphorus available for uptake from the manufactured fertilizer so that less of the fertilizer is required. The fungus is applied to the soil separately from the fertilizer but can be added in proximity to, or in combination with, plant seeds. The invention can be used to increase the phosphorus uptake of plants which will …

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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 October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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 24, 1987
GrantedOctober 13, 1992
Term endedOctober 13, 2009
Patent numberCA 1308566 C
Classification (IPC)C05G3/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 24, 1987Patent grantedOct 13, 1992Term endedOct 13, 2009

Sources & verification

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