Patents by Inventor Tuula S. M. Makinen

Tuula S. M. Makinen 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).

  • Method for producing high-grade nickel matte and metallized sulfide matte
    Patent number: 5332414
    Abstract: The invention relates to a method for producing high-grade nickel matte and highly oxidized slag in a flash smelting furnace, and for reducing the slag from the flash smelting furnace and for sulfurating the created matte in an electric furnace. The matte created in the flash smelting furnace and in the electric furnace are both directly conducted to hydrometallurgical further treatment.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: July 26, 1994
    Assignee: Outokumpu Harjavalta Metals Oy
    Inventor: Tuula S. M. Makinen
  • Process for the recovery of lead from a lead-bearing sulfide concentrate
    Patent number: 4388111
    Abstract: Lead is recovered from a lead-bearing sulfidic concentrate by heating the concentrate in such a manner that lead and its compounds pass into the gas phase. The oxygen pressure in the gas phase is adjusted by oxidation or reduction in order to cause the compounds of lead to react with each other to form lead, and the gas phase is cooled in order to condense the metallic lead out from the gas.
    Type: Grant
    Filed: April 15, 1981
    Date of Patent: June 14, 1983
    Assignee: Outokumpu Oy
    Inventors: Timo T. Talonen, Tuula S. M. Makinen