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Expired Canadian patentCanada

Ionizing chamber for gaseous oxygen

CA 1291065 C · Owner: Blach, Thomas · Inventors: Blach, Thomas

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

An ionization chamber for producing oxygen ions prefer-, ably positive oxygen ions, without substantial ozone formation. The housing can be composed of polyvinyl chloride or another insulating material and the ionization electrodes can include a cathode wire closed to the inlet and an anode wire downstream from the cathode wire, the wires extending transverse to the oxygen flow direction.

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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 22, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 22, 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.
FiledMay 1, 1986
GrantedOctober 22, 1991
Term endedOctober 22, 2008
Patent numberCA 1291065 C
Classification (IPC)H01T23/00 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 1, 1986Patent grantedOct 22, 1991Term endedOct 22, 2008

Sources & verification

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