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Expired Canadian patentCanada

Plate type filter apparatus

CA 1102712 A · Owner: Schneider (J. R.) Co. Inc. · Inventors: Schneider, John R.; Klyver, Kenneth B.

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

Abstract of the Disclosure Disclosed is an improved filter of the type comprised of a series of stacked plate assemblies forming filter chambers adjacent to sheets of filter media between plate assemblies. The plate assemblies are constructed so that liquid can be rapidly removed from the filter chambers to prevent spillage when it becomes necessary to separate the plate assemblies and replace the filter media. Each plate assembly has an internal baffle system along one side having inlets for liquid to be filtered. The baffle system for each plate assembly deflects liquid coming into the chamber so as to prevent it from disturbing the filter cake, and it also allows substantially all of 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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 8, 1977
GrantedJune 9, 1981
Term endedJune 9, 1998
Patent numberCA 1102712 A
Classification (IPC)B01D25/12 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedSep 8, 1977Patent grantedJune 9, 1981Term endedJune 9, 1998

Sources & verification

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