Patents by Inventor Matti J. Hamalainen

Matti J. Hamalainen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4208380
    Abstract: Cobalt is recovered as a finely-divided and anhydrous salt from impure, nickel-bearing, aqueous solutions of cobalt, by exposing the aqueous solution to oxidation at an elevated temperature in the presence of ammonia and the respective ammonium salt, the formation of cobalt (III) hexammine ions is catalysed with activated carbon or solid sulfides, a cobalt (III) hexammine salt is crystallized from the solution, the salt is separated from the solution and pyrolysed to form a cobalt (II) salt, and the released ammonia is returned to the oxidation stage.
    Type: Grant
    Filed: July 7, 1978
    Date of Patent: June 17, 1980
    Assignee: Outokumpu Oy
    Inventors: Matti J. Hamalainen, Jussi K. Rastas, Heikki A. Tiitinen, Tom O. Niemi
  • Patent number: 4178172
    Abstract: Extra fine cobalt powder is manufactured by pyrolysing a cobalt (III)hexammine salt and then reducing the obtained oxide.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: December 11, 1979
    Assignee: Outokumpu Oy
    Inventors: Heikki A. Tiitinen, Jussi K. Rastas, Matti J. Hamalainen, Tom O. Niemi