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Expired Canadian patentCanada

Method and apparatus for mixing

CA 1306247 C · Owner: The Boc Group Plc · Inventors: Leeson, Richard Harvey; Booker, Paul Ian

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

Apparatus for mixing dough comprises a dough mixer chamber which has a lid. The chamber is associated with a flour hopper and also provided with a conduit for oxygen-enriched air a water inlet, and a, vent pipe. In operation of the chamber dough is agitated by, agitator and a valve in the conduit for oxygen-enriched air is opened for chosen intervals of time to allow oxygen-enriched air to be passed into the chamber. During chosen time periods a valve in the water inlet is opened to enable at least that part of the conduit for oxygen-enriched air proximate the chamber to be flushed with water. MW/NJP/8617 USA

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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 August 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 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.
FiledMay 22, 1987
GrantedAugust 11, 1992
Term endedAugust 11, 2009
Patent numberCA 1306247 C
Classification (IPC)A21C1/10 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMay 22, 1987Patent grantedAug 11, 1992Term endedAug 11, 2009

Sources & verification

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