Patents by Inventor Evert Heeren

Evert Heeren 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 treating refuse scrap
    Patent number: 5067659
    Abstract: Refuse scrap from incinerated refuse or nonincinerated refuse is dried and precleaned to a metal content in excess of 70% and is then comminuted and abraded in a hammer shredder with the comminuted material being subjected to air separation and magnetic separation to yield a metal product containing at least 90% metal and with a density of at least 1 ton per m.sup.3 for direct use as any other iron scrap in a steel-making plant.
    Type: Grant
    Filed: August 13, 1990
    Date of Patent: November 26, 1991
    Assignee: Hoesch Werke AG
    Inventors: Evert Heeren, Hans Gotthelf
  • Apparatus for processing refuse to produce steel-making scrap
    Patent number: 4662570
    Abstract: Refuse scrap from incinerated refuse or nonincinerated refuse is dried and precleaned to a metal content in excess of 70% and is then comminuted and abraded in a hammer shredder with the comminuted material being subjected to air separation and magnetic separation to yield a metal product containing at least 70% metal and with a density of at least 1 ton per m.sup.3 for direct use as any other iron scrap in a steel-making plant.
    Type: Grant
    Filed: October 4, 1985
    Date of Patent: May 5, 1987
    Assignee: Hoesch Werke A.G.
    Inventors: Evert Heeren, Hans Gotthelf