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Expired Canadian patentCanada

Process for producing composite powder particles

CA 1085239 A · Owner: Sherritt Gordon Mines Limited · Inventors: Prowse, Ronald L.; Silins, Vilnis

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

A process for producing composite powder particles having cores within a predetermined size range coated by a metallic outer layer, the predetermined core size range being within the overall size range of from about 5 to about 250 µm. Core particles of a size smaller than the lower limit of the predetermined size range are mixed with a polymeric bonding substance and the resulting mixture is formed into solid agglomerates of a size within the predetermined range to form the cores with, each core comprising a plurality of core particles bound together by the polymeric bonding substance. The cores are then coated with a metallic outer layer to form composite powder particles.

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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 9, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 1997.
  • 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 26, 1977
GrantedSeptember 9, 1980
Term endedSeptember 9, 1997
Patent numberCA 1085239 A
Classification (IPC)C08K9/10 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedApril 26, 1977Patent grantedSep 9, 1980Term endedSep 9, 1997

Sources & verification

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