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Expired Canadian patentCanada

Feed and accept duct system for hydrocyclones

CA 1236794 A · Owner: Enso-Gutzeit Oy · Inventors: Kuhasalo, Antti; Titoff, Juha; Vikio, Pentti

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Abstract From the Canadian patent

of Disclosure, The present invention concerns a feed and accept duct system for hydrocyclones , comprising common feed and accept ducts which have by connecting tubes been connected to the parallel hydrocyclones. This type of Construction is used for instance, in, purifying fibre suspensions in which process the suspension is fed into the hydrocyclones and the purified suspension is removed therefrom as a so-called accept fraction into the accept duct It is essentia1 in the invention that the connecting tubes of the feed and accept ducts have been 50 placed on the different hydrocyclones that the tubes are located substantially in parallel, that the feed and accept ducts have been formed …

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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 17, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 19, 1985
GrantedMay 17, 1988
Term endedMay 17, 2005
Patent numberCA 1236794 A
Classification (IPC)B04C3/04 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedMarch 19, 1985Patent grantedMay 17, 1988Term endedMay 17, 2005

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