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Expired Canadian patentCanada

Method for sorting radioactive waste

CA 1257224 A · Owner: Hydro Nuclear Services, Inc. · Inventors: Prisco, Anthony J.; Johnson, Alfred N.

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

This invention related to a method for examining dry material, components of which may have a low level of radioactivity to sort the radioactive components from the nonradioactive components. It comprises the steps of placing of material in a first detection station where radiation above a predetermined level can be detected and then removing the components from which the radiation is emanating. The remainder of the material is then conveyed to a second detection station where means are provided for detecting radiation above a second predetermined level. The components of the material which is detected as having radiation which is a level above the second level is then removed. The …

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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 July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 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.
FiledSeptember 10, 1985
GrantedJuly 11, 1989
Term endedJuly 11, 2006
Patent numberCA 1257224 A
Classification (IPC)B02C23/14 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedSep 10, 1985Patent grantedJuly 11, 1989Term endedJuly 11, 2006

Sources & verification

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