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Expired Canadian patentCanada

Infeed tube for disc refiners

CA 1078237 A · Owner: Bauer, Bros. Co. (The) · Inventors: Engall, Fred

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

Title, INFEED TUBE FOR DISC REFINERS, ABSTRACT OF THE DISCLOSURE An infeed structure for a refiner includes a body having two passages which at their one ends commonly open from a portion of the body which is adapted to bridge an inlet opening to the interior of a disc type refiner. One of the passages is a material infeed passage and the other a steam vent passage. Incorporated in the portion of the body adapted to bridge the inlet opening to a disc refiner are means preferably, integrated, which in the application of the infeed structure serves to distinctly separate the discharge end of the material infeed passage from the inlet end of the steam vent passage. The discharge end of the …

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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 27, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 27, 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.
Filed—
GrantedMay 27, 1980
Term endedMay 27, 1997
Patent numberCA 1078237 A
Classification (IPC)D21D1/30 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedMay 27, 1980Term endedMay 27, 1997

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