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Expired Canadian patentCanada

Inorganic, insoluble industrial raw material producible from waste and method for its production and use

CA 1322010 C · Owner: Weinwurm, Peter · Inventors: Weinwurm, Peter

CIPO record

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Abstract From the Canadian patent

A method for handling, treating heating and, incinerating, on-site, liquid waste sewage, sludge, cakes or, solid waste. The primary treatment process utilizes a 0.1-50% powder of plastic clay and may include separation absorption, precipitation, neutralization sedimentation, flocculation, coagulation filtration or dewatering. The residue remaining after the primary treatment is mixed with additional clay or silicates and a suitable absorbent for either organic or inorganic, liquid material, to form a solid mixture of approximately 5-50% clay or silicates and 0.1-10% absorbent. The solidified mixture is formed into granules or other shapes having large surface area. The stable, solid …

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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 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 7, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 21, 1988
GrantedSeptember 7, 1993
Term endedSeptember 7, 2010
Patent numberCA 1322010 C
Classification (IPC)B09B3/00 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedOct 21, 1988Patent grantedSep 7, 1993Term endedSep 7, 2010

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