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Expired Canadian patentCanada

Process and composition for the anticlumping of non- powdery salts or fertilizers

CA 1269860 C · Owner: Petitbon, Pascal · Inventors: Petitbon, Pascal; Schapira, Joseph; Cheminaud, Jean-Claude

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Abstract From the Canadian patent

The invention relates to a process for the anticlumping of non-powdery salts or fertilizers characterized, by the fact that there is sprayed onto the constituent particles of the fertilizer, after drying and before storage at a moment when said particles are in their final form and have acquired almost the whole of their final mechanical properties, an effective amount:, - either of an aqueous solution of alkali or amine silicate whose content of dry matter is from 15 to 60% by weight, this application being preceded or followed by an application of an anionic surfactant in aqueous or oily solution, - or of an aqueous solution of alkali or amine silicate comprising an anionic surfactant in …

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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 June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • 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, 1985
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1269860 C
Classification (IPC)B01J2/30 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedDec 24, 1985Patent grantedJune 5, 1990Term endedJune 5, 2007

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