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Expired Canadian patentCanada

Method, apparatus, and probe for measuring the activity of a solute element in molten metal

CA 1303133 C · Owner: Nagatsuka, Toshio · Inventors: Nagatsuka, Toshio; Hasegawa, Teruyuki; Furuta, Chikayoshi

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Abstract From the Canadian patent

A method for measuring an activity of a solute element M in molten metal comprises steps of measuring an electromotive force El corresponding oxygen content of the molten metal by means of a solid electrolyte having oxygen ion conductivity and measuring temperature T of the molten metal, also measuring the electromotive force E2 corresponding to manganese content of the molten metal by means of a solid electrolyte having oxygen ion conductivity and coated with MnO, and obtaining the manganese activity aMn on the basis of the measured electromotive forces El, E2 and the measured temperature T. Another activity measuring method comprises steps of measuring the temperature T and solidifying …

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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 5, 1989
GrantedJune 9, 1992
Term endedJune 9, 2009
Patent numberCA 1303133 C
Classification (IPC)G01N27/40 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedSep 5, 1989Patent grantedJune 9, 1992Term endedJune 9, 2009

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