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Expired Canadian patentCanada

Process for removing molybdenum from aqueous salt solutions

CA 1186154 A · Owner: Hoechst Aktiengesellschaft · Inventors: Preisler, Eberhard; Holzem, Johannes; Hofmann, Bernhard

CIPO record

Overview

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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 disclosure relates to a process for removing molybdenum from aqueous salt solutions by adsorbing it on manganese dioxide. To this end, the salt solution is contacted with a bed of manganese dioxide (MnO2)precipitated electrolytically and transformed into granular material.

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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 April 30, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 30, 2002.
  • 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 31, 1982
GrantedApril 30, 1985
Term endedApril 30, 2002
Patent numberCA 1186154 A
Classification (IPC)C22B47/00 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedMarch 31, 1982Patent grantedApril 30, 1985Term endedApril 30, 2002

Sources & verification

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