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Expired Canadian patentCanada

Process and equipment for cutting material

CA 1189425 A · Owner: Kramer & Grebe Gmbh & Co. Kg · Inventors: Grebe, Reiner; Schmidt, Karl-Heinz; Norbisrath, Max

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 process for cutting of material includes the continuous loading therefrom into a generally cylindrically or conically shaped vessel which is rotating around its longitudinal axis in which is mounted, a fast rotating knife shaft its knives which are provided with one or several cutting edges reach near to the inside wall of the vessel. The material to be cut loaded into the vessel in axial direction deposits a layer on the inside wall of the vessel in consequence of the centrifugal force, which is tretaed by the knives and is displaced in axial direction to the discharging end of the vessel where the cut material is continuously taken away. The equipment include a material feeding device, …

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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 June 25, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 25, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 28, 1982
GrantedJune 25, 1985
Term endedJune 25, 2002
Patent numberCA 1189425 A
Classification (IPC)B26D1/00 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMay 28, 1982Patent grantedJune 25, 1985Term endedJune 25, 2002

Sources & verification

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