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Expired Canadian patentCanada

Potable water filter

CA 1309032 C · Owner: Solomon, Romona L. · Inventors: Good, Charlie J.; Solomon, Donald F.; Solomon, Romona L.

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 potable water filter comprising a housing having an inlet and first and second outlets, a tube in the housing having a peripheral wall, a passage extending through the tube, and an opening in the peripheral wall leading to the passage, a tubular pleated filter element surrounding the tube and a carbon filter element within the tube. Some of the water from the inlet flows through the tubular filter element and the carbon filter element to the second outlet. Another portion of the water from the inlet flows along the tubular filter element to flush the tubular filter element and then f lows out the first outlet.

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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 October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
  • 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 30, 1987
GrantedOctober 20, 1992
Term endedOctober 20, 2009
Patent numberCA 1309032 C
Classification (IPC)B01D29/54

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedSep 30, 1987Patent grantedOct 20, 1992Term endedOct 20, 2009

Sources & verification

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