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Expired Canadian patentCanada

Device for diffusing matter between two fluids via semi-permeable diaphragms

CA 1061725 A · Owner: Gambro Ag · Inventors: Riede, Gerhard

CIPO record

Overview

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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 present invention provides a device for diffusing matter between two fluids via semi-permeable diaphragms which are arranged in pairs between spacing plates in a pile of at least two such plates and at least one pair of diaphragms each, plate comprising throughflow passages for the respective fluid connected to the inlet and the outlet, of which fluids a first fluid is adapted to be led between the diaphragms arranged in pairs and a second fluid outside the said diaphragms the said, pile being clamped between a bottom portion and a top portion wherein the spacing plates and the said top and bottom portions have an elongated, essentially rectangular shape with tapering ends and with 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 September 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 4, 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—
GrantedSeptember 4, 1979
Term endedSeptember 4, 1996
Patent numberCA 1061725 A
Classification (IPC)F23J3/02 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedSep 4, 1979Term endedSep 4, 1996

Sources & verification

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