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Expired Canadian patentCanada

Method and apparatus for promoting release of fines

CA 1097250 A · Owner: Uss Engineers And Consultants, Inc. · Inventors: Miles, Roscoe C.; Douty, Donald L.; St. Clair, Paul L.

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

An endless conveyor belt apparatus us employed for moving raw materials which are characterized in having fines associated therewith from one point to another. The apparatus includes a silicone-emulsion spraying device for applying an aqueous solution of the silicone-emulsion to the material supporting side of the endless belt in sufficient concentrations to promote the release of the fines from the belt when the material being conveyed is dumped, thereby preventing the undesirable build-up of fines on return idler rolls and beneath the belt at points along the belt's return path.

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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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 1998.
  • 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 15, 1976
GrantedMarch 10, 1981
Term endedMarch 10, 1998
Patent numberCA 1097250 A
Classification (IPC)B65G47/34 +1 more

Timeline

Timeline From CIPO dates

19771980198319861989199219951998Application filedApril 15, 1976Patent grantedMarch 10, 1981Term endedMarch 10, 1998

Sources & verification

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