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Expired Canadian patentCanada

Encapsulated frame type filter press

CA 1203419 A · Owner: Stavo Industries, Inc. · Inventors: Vogel, George P.

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

An upwardly opening tank including interconnected opposite side and end walls and a first stationary filter head therein is provided. A second head is mounted in the tank and is shiftable toward and away from the stationary head for clamping a plurality of filter frames between the heads. The stationary head includes inlet and outlet passages for inlet and outlet flow of fluid to be filtered and a downwardly opening cover is provided for the tank including interconnected opposite side and end walls. A lift frame swingably supports the cover from the tank for forward and downward swinging of the cover into closed position and upward and rearward swinging of the cover toward an open position …

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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 April 22, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 22, 2003.
  • 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 3, 1983
GrantedApril 22, 1986
Term endedApril 22, 2003
Patent numberCA 1203419 A
Classification (IPC)B01D25/12

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMay 3, 1983Patent grantedApril 22, 1986Term endedApril 22, 2003

Sources & verification

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