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Expired Canadian patentCanada

Device for separation of a liquid medium containing constituents which are separable in a filter

CA 1321359 C · Owner: Raision Tehtaat Oy Ab · Inventors: Dahlquist, Erik; Enekull, Ake

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 device for separation of constituents separable in a, filter, from a liquid medium comprising a stack of a, plurality of plate units arranged one after the other, with, filters arranged therein. Along the filters there are arranged rotors for scraping off coatings deposited on the filters. Each rotor is mounted on a separate shaft piece arranged in each plate. The shaft pieces are connected to each other by means of connections which can be drawn apart in the stacking direction of the plate units. Defects in the device can be detected in an channel which extends in the stacking direction of the plate units and which is common to liquid having passed through the filter. A defective plate …

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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 17, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 17, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 9, 1988
GrantedAugust 17, 1993
Term endedAugust 17, 2010
Patent numberCA 1321359 C
Classification (IPC)B01D25/12 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 9, 1988Patent grantedAug 17, 1993Term endedAug 17, 2010

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