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Expired Canadian patentCanada

Spherulizing furnace and process of manufacturing vitreous beads

CA 1332511 C · Owner: Neusy, Hubert · Inventors: Neusy, Hubert

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 spherulizing furnace for manufacturing vitreous beads comprises feed means for delivering particulate feedstock, a spherulizing zone for, example in a combustion chamber, in which the feedstock particles may be heated by burner and converted to vitreous beads, and means for collecting the resulting beads. The feed means comprises a reservoir adapted to hold a fluidized bed of feedstock particles, and the reservoir has at least one overflow feed outlet opening over which fluidized particles can flow under gravity for delivery to the spherulizing zone.

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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 October 18, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 18, 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.
FiledJuly 6, 1988
GrantedOctober 18, 1994
Term endedOctober 18, 2011
Patent numberCA 1332511 C
Classification (IPC)C03B19/10

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedJuly 6, 1988Patent grantedOct 18, 1994Term endedOct 18, 2011

Sources & verification

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