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Expired Canadian patentCanada

Method for common cultivation of corn and sorghum for producing silage

CA 1306143 C · Owner: Banfai, Jozsef · Inventors: Rozsas, Attila; Lakatos, Csaba; Banfai, Jozsef

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 is disclosed in which sorghum is sown in storeyed manner over the corn in each row. It is suitable to use a headless sorghum variety. Corn is sown at a density of from 50 to 60,000 plants/ha and sorghum, at a density of from 200 to 220,000 plant/ha. Sowing is determined by the heat demand of the sorghum harvesting, is determined by the water-content of the corn. It is advantageous to allow the sorghum to remain on the stubble-fields to shoot and grow after harvesting to produce a secondary harvest.

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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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 1, 1987
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306143 C
Classification (IPC)A01C7/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 1, 1987Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

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