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Expired Canadian patentCanada

Separator for dental suction systems

CA 1293455 C · Owner: Trawoger, Werner · Inventors: Trawoger, Werner; Pregenzer, Bruno

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

A separator for separating a mixture of solids liquids, and suction air, as used in dental suction systems has a housing, that incorporates an inlet for the mixture coming in from a suction nozzle, an air separator chamber having a deflector a clean, air outlet leading from this to a suction pump. A settling tank is arranged beneath the air separator chamber this settling tank, being used for the sedimentation of the solids up to a predetermined level, and there is an outlet for the liquid that collects above the sedimenting solids, this outlet being secured against the ingress of unwanted air. A secondary tank is associated with the settling tank opens into the air separator chamber 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

  • Granted December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 16, 1985
GrantedDecember 24, 1991
Term endedDecember 24, 2008
Patent numberCA 1293455 C
Classification (IPC)B01D45/02 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedDec 16, 1985Patent grantedDec 24, 1991Term endedDec 24, 2008

Sources & verification

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