Patents by Inventor Petrus J. A. Kramer

Petrus J. A. Kramer 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 of removal of slag deposits from the bottom of a furnace
    Patent number: 4350324
    Abstract: Slag deposited on the bottom of a steel making furnace, especially a soaking pit for steel ingots, is difficult to remove. To enable this to be done while the furnace is hot, it is now proposed to supply a substance, e.g. ferro-silicon, which lowers the melting point of the slag, and a substance which reacts exothermically to initiate melting of the slag. When the slag is sufficiently liquefied, it is removed by means of a mechanical grab.
    Type: Grant
    Filed: December 16, 1980
    Date of Patent: September 21, 1982
    Assignee: Estel Hoogovens B.V.
    Inventor: Petrus J. A. Kramer