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Expired Canadian patentCanada

Filter means with a segmental construction

CA 1263320 C · Owner: Kemmelmeyer, Werner H. · Inventors: Kemmelmeyer, Werner H.

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 invention relates to a filter means for filtering gases, liquids or similar filtering media preferably, for process engineering plants e.g. those for the, foods and drinks industry such as for compressed air, preparation particularly in sterile operation, optionally under overpressure conditions and/or at high temperatures in which there is a segmental construction formed by, essentially circular filter elements against which a, flow can take place from the inside and outside together, with interposed, disk-shaped filter material and in which the entire edge area of the filter material sealingly cooperates with the filter elements.

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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 November 28, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 28, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 11, 1985
GrantedNovember 28, 1989
Term endedNovember 28, 2006
Patent numberCA 1263320 C
Classification (IPC)B01D46/54 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 11, 1985Patent grantedNov 28, 1989Term endedNov 28, 2006

Sources & verification

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