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Expired Canadian patentCanada

Separating grate for a grain harvester

CA 1300458 C · Owner: Peters, Loren William · Inventors: Wilson, John Edward; Peters, Loren William; Bennett, Robert Edwin

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 Disclosure, In an axial flow rotary separator a separator grate forming, part of a generally cylindrical separator casing consists of a series of circumferentially spaced, axially extending finger bar assemblies. In each finger bar assembly side by side fingers extend circumferentially in the direction of rotation, supported cantilever fashion by an axially extending finger support bar. The fingers and support bar inner surfaces all lie approximately in a cylindrical surface but the radial offset of the free ends of the fingers relative to the following finger support bar, may be chosen or varied according to the crop handled and the grate characteristics desired. In a …

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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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 29, 1988
GrantedMay 12, 1992
Term endedMay 12, 2009
Patent numberCA 1300458 C
Classification (IPC)A01F12/44 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedFeb 29, 1988Patent grantedMay 12, 1992Term endedMay 12, 2009

Sources & verification

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