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Expired Canadian patentCanada

Air classification in a spray grainer

CA 1215637 A · Owner: Olin Corporation · Inventors: Bridges, William G.

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

Abstract Of The Invention, In a rotary drum spray grainier there is provided a solid product material exit at the same end as the inlet hot air so that air classification of the solid product material according to size is achieved while the solid product material passes counter-current to the inlet hot air as the solid product material exits the drum.

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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 December 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 29, 1984
GrantedDecember 23, 1986
Term endedDecember 23, 2003
Patent numberCA 1215637 A
Classification (IPC)B01J2/12

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedAug 29, 1984Patent grantedDec 23, 1986Term endedDec 23, 2003

Sources & verification

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