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Expired Canadian patentCanada

Ozone generator and an electrode therefor

CA 2574513 C · Owner: Lang, Helmut V. · Inventors: Suter, Marcel; Lang, Helmut V.; Vezzu, Guido

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The inventive ozone generator comprises at least one tubular external electrode (4) at least one internal electrode (7), wherein each internal electrode consists of a plurality of tubular metal segments (8) which are closed at least partially at each end and externally ceramic-coated said tubular segments are disposed one behind another mechanically de-coupled from each other and electrically connected a rod (11) axially crosses the tubular segments (8) and is provided on the end thereof with means (12 13) for axially clamping the tubular segments to each other in such a way that an electric contact is formed. Each tubular metal segment (8) is provided at each end thereof with an outwardly …

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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 November 9, 2004 and granted October 9, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2024.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 9, 2004
GrantedOctober 9, 2012
Term endedNovember 9, 2024
Patent numberCA 2574513 C
Classification (IPC)C01B13/11

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedNov 9, 2004Patent grantedOct 9, 2012Term endedNov 9, 2024

Sources & verification

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