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Expired Canadian patentCanada

Wet granulation method for generating fertilizer granules

CA 2265919 C · Owner: Airborne Industrial Minerals Inc. · Inventors: Phinney, Robin

CIPO record

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Abstract From the Canadian patent

A method of wet granulation of fertilizer and other materials into granules. The method involves formation of the granule directly on the pan from the feedstock without intermediate steps or the use of seed materials. The result is a product having a completely uniform cross section. The feedstock is initially in the size distribution of -150 mesh with 90% or greater in the size range of 200 mesh. Moisture is maintained to facilitate a steady process without cycling. The method has the advantage of allowing granulation of materials either known to be hazardous or inherently difficult to granulate in a safe and expedient manner.

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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

  • Filed April 8, 1999 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 8, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 8, 2021.
  • 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 8, 1999
GrantedDecember 19, 2000
Term endedApril 8, 2019
Patent numberCA 2265919 C
Classification (IPC)C05G5/00 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedApril 8, 1999Patent grantedDec 19, 2000Term endedApril 8, 2019

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