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Expired Canadian patentCanada

Process for the conditioning of radioactive or toxic waste in epoxy resins and polymerizable mixture with two liquid constituents usable in this process

CA 1261985 A · Owner: Commissariat A L'Energie Atomique · Inventors: De Tassigny, Christian

CIPO record

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Abstract From the Canadian patent

The invention relates to a process for the conditioning of radioactive or toxic waste in epoxy resins and a polymerizable mixture with two liquid constituents usable in this process. This process consists of incorporating the waste into a polymerizable mixture incorporating at least one epoxy resin pitch and at least one epoxy resin hardener and allowing the thus obtained mixture to harden. Generally the mixture comprises at least 50% by weight pitch and can be used for treating radioactive waste constituted by large objects and organic liquids.

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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 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 31, 1986
GrantedSeptember 26, 1989
Term endedSeptember 26, 2006
Patent numberCA 1261985 A
Classification (IPC)G21F9/34 +1 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedJan 31, 1986Patent grantedSep 26, 1989Term endedSep 26, 2006

Sources & verification

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