Patents by Inventor Olli V. J. Hyvarinen

Olli V. J. Hyvarinen 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 removing sulphur and nitrogen compounds from gas
    Patent number: 5009870
    Abstract: The invention relates to a method for removing sulphur and nitrogen compounds from gases by means of long-chained sulphur compounds mainly in acidic conditions, with an electroconductive solid material serving as the carrier of the long-chained sulphur compounds. The properties of the solid material surface are adjusted to be favourable to the sulphur polymer by means of potential measurements with mineral electrodes.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: April 23, 1991
    Assignee: Outokumpu Oy
    Inventors: Seppo O. Heimala, Olli V. J. Hyvarinen, Maija-Leena Metsarinta
  • Method for removing arsenic from a sulphuric-acid solution
    Patent number: 4474654
    Abstract: The present invention relates to a method for removing arsenic from a sulphuric-acid solution by electrolytically precipitating the solution. The employed current density is adjusted by observing the arsenic and copper contents of the solution with a solution analyser, so that operation takes place below the limiting current density peculiar to each system.
    Type: Grant
    Filed: August 3, 1983
    Date of Patent: October 2, 1984
    Assignee: Outokumpu Oy
    Inventor: Olli V. J. Hyvarinen
  • Procedure for roasting seleniferous material
    Patent number: 4473396
    Abstract: The invention concerns a procedure for separating selenium from seleniferous raw material by roasting this material with oxygen at elevated temperature in enclosed space.With a view to improving the separation of selenium, the roasting is carried out in the presence of oxides of sulphur.
    Type: Grant
    Filed: June 23, 1983
    Date of Patent: September 25, 1984
    Assignee: Dutokumpu Oy
    Inventors: Olli V. J. Hyvarinen, Leo E. Lindroos, Eino A. Rosenberg
  • Process for selective removal of bismuth and antimony from an electrolyte, especially in electrolytic refining of copper
    Patent number: 4157946
    Abstract: Antimony and bismuth are selectively removed from an electrolyte solution, especially a solution used for the electrolytic refining of copper by adding to the electrolyte solution a carbonate of barium, strontium, or lead.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: June 12, 1979
    Assignee: Outokumpu, Oy
    Inventor: Olli V. J. Hyvarinen