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Expired Canadian patentCanada

Apparatus for generating ozone and/or o1 using a high energy plasma discharge

CA 2461223 C · Owner: Phillips, Shirley · Inventors: Phillips, Andrew; Phillips, Stanley; Phillips, Shirley

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 electro chemical conversion cell that can break down certain gasses to provide ozone and monovalent oxygen from a supplied volume of a suitable O2-containing gas. The conversion cell is provided with at least one metal mesh electrode within a generator reaction chamber and a power supply which is adapted to supply a high alternating electric current voltage to at least partially break-down O2 in the input gas to yield ozone. A fluid flow passage extends through the reaction chamber as a generally elongated passage through the reaction cavity. The fluid flow passage extends from an upstream end where the O2-containing gas is initially supplied into the housing to a downstream end where …

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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 March 16, 2004 and granted May 28, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 16, 2004
GrantedMay 28, 2013
Term endedMarch 16, 2024
Patent numberCA 2461223 C
Classification (IPC)C01B13/11 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMarch 16, 2004Patent grantedMay 28, 2013Term endedMarch 16, 2024

Sources & verification

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