Method and apparatus for producing ozone
CA 2069070 A1 · Owner: Air Products And Chemicals, Inc. · Inventors: Defour, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Gaseous oxygen is passed upwardly in the annular space between a central electrode and a cylindrical electrode to which a high voltage, high frequency signal is applied. Perfluorodecalin is continually passed down the inner surface of the cylindrical electrode in the form of a film which serves both to cool the cylindrical electrode and as a dielectric. The electrodes and may be in the form of a grid and may be coated with a metal oxide to inhibit decomposition of the ozone generated. Similarly particles of metal oxide may be suspended in the liquid. A refrigeration unit is provided to cool liquid en route to the electrodes. Fig. 1
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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 May 20, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.