Patents by Inventor Onni Pusa

Onni Pusa 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).

  • Refining process based on top-blowing with oxygen
    Patent number: 4163663
    Abstract: A process for refining iron melts by blowing oxygen onto the surface of the iron melt, the quantity or concentration of the stream of oxygen being kept constant for most of the blowing time and being reduced in one or more stages towards the end of the blowing time without any significant increase in the total blowing time.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: August 7, 1979
    Assignee: Svenskt Stal Aktiebolag
    Inventor: Onni Pusa