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Expired Canadian patentCanada

Incineration residue treatment process and apparatus

CA 1332025 C · Owner: Roberts, William A. · Inventors: Roberts, William A.

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

Residue produced by incineration of commercial indus-, trial or municipal waste is treated on-site at the point of generation or storage. Moist residue such as inciner-, ator bottom ash, is mixed in a multi-segment rotary drum with a heavy metals treatment agent in a first section of the drum. An aggregation agent is added to the mixture and the mixture separates under the shearing force imposed by the rotating drum into individual pieces which are rolled into balls. A cementitious coating material is added to coat the balls, and the coated balls are classified by size. The classified coated balls are conveyed to a bagging plant, where they are packaged in flexible containers formed from …

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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 September 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 20, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 22, 1989
GrantedSeptember 20, 1994
Term endedSeptember 20, 2011
Patent numberCA 1332025 C
Classification (IPC)B01J2/12 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedJune 22, 1989Patent grantedSep 20, 1994Term endedSep 20, 2011

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