Method and apparatus for monitoring a selected group of fuel cells of a high-temperature fuel cell stack
CA 2254232 A1 · Owner: Siemens Aktiengesellschaft · Inventors: Stuhler, Walter; Zeilinger, Reinhold; Keim, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a method and an apparatus for monitoring a selected group of fuel cells of a high-temperature fuel cell stack a change, over time in an averaged electrical voltage of the fuel cells of the selected group is ascertained and compared with a reference value that detects at least a change over time in a voltage of other fuel cells. The method permits a reliable detection of the failure of one fuel cell of a stack with simple measures.
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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 18, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2020.
- 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
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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.