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Expired Canadian patentCanada

Process in the cleaning of seed, grain and similar goods, and a cleaning machine for carrying out the process

CA 1055352 A · Owner: Ab Linde Maskiner · Inventors: Andren, Ingmar

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

The disclosure relates to a process and a cleaning machine for seed, grain and similar goods in which the clean-, ing is realised by means of air circulated in an enclosed path by at least one fan, the air passing the grain adjacent the discharge opening of the machine for the air-cleaned grain. In the machine the resistance to the air circulating in the enclosed path is adjusted such that the static O-point will be located in the vicinity of the discharge opening for the aircleaned grain. Furthermore, for the purposes of the above-disclosed process, the fan cooperates with a duct for the cleaning air moving to the fan, and with a duct for the air recycled to the cleaning station at 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 29, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 1996.
  • 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 29, 1979
Term endedMay 29, 1996
Patent numberCA 1055352 A
Classification (IPC)A01F12/44 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedMay 29, 1979Term endedMay 29, 1996

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