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Expired Canadian patentCanada

Air and liquid separator for a carpet extractor

CA 2219180 C · Owner: Lesco, Erik D. · Inventors: Mueller, David G.; Lesco, Erik D.

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

An air/liquid separator is provided in a hollow preferably, transparent, removable lid on a recovery tank of a wet pickup suction cleaner. The lid has a wall therein dividing the lid into an inlet/separating chamber and an exit chamber. Liquid and dirt entrained working air enters the inlet chamber and flows horizontally across the inlet chamber over a plurality of discharge openings passing through the lid bottom plate, such that the stream of dirty liquid and air is redirected downward through the discharge openings into the recovery tank. The plurality of discharge openings in the lid bottom plate are arranged generally progressively along the stream of liquid and air entering and …

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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

  • Filed October 27, 1997 and granted June 13, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 27, 2017.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 27, 2019.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 27, 1997
GrantedJune 13, 2000
Term endedOctober 27, 2017
Patent numberCA 2219180 C
Classification (IPC)B01D19/00 +2 more

Timeline

Timeline From CIPO dates

1998200020022004200620082010201220142016Application filedOct 27, 1997Patent grantedJune 13, 2000Term endedOct 27, 2017

Sources & verification

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