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Expired Canadian patentCanada

Rotating radial screen filter

CA 1048419 A · Owner: Dresser Industries · Inventors: Berriman, Lester P.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A method and apparatus is provided for separating a carrier fluid from particles held in suspension in the fluid and which are of greater density than the fluid. The apparatus includes a rotatably mounted frame and a screen mounted on the frame and extending in a largely radial direction from the axis of rotation of the frame. A feed conduit feeds fluid with suspended particles therein along a first face of the screen while, a filtrate conduit carries away fluid which passes through the screen and a concentrate conduit carries away fluid with a high concentration of particles therein which has passed across the first face of the screen without passing through the screen. The frame is …

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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 February 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 13, 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—
GrantedFebruary 13, 1979
Term endedFebruary 13, 1996
Patent numberCA 1048419 A
Classification (IPC)B01D33/06 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedFeb 13, 1979Term endedFeb 13, 1996

Sources & verification

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