Patents by Inventor C. William Cornelssen

C. William Cornelssen 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).

  • Iron powder and method of producing such
    Patent number: 6569220
    Abstract: A method of producing iron powder comprises the step of providing a supply of iron oxide powder of a size less than 1000 microns which is then heated in a reducing agent atmosphere to a temperature between 1000° F. and 2100° F., thus resulting in the ironoxide powder being reduced to iron powder, cooling the iron powder in an inert gas atmosphere to a temperature below 150° F. and milling to a median particle size diameter of less than or equal to 20 microns.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: May 27, 2003
    Inventors: Donald W. Clark, C. William Cornelssen
  • Iron powder and method of producing such
    Patent number: 5713982
    Abstract: A method of producing iron powder comprises the step of providing a supply of iron oxide powder of a size less than 1000 microns which is then heated in a reducing agent atmosphere to a temperature between 1000.degree. F. and 2100.degree. F., thus resulting in the iron oxide powder being reduced to iron powder, cooling the iron powder in an inert gas atmosphere to a temperature below 150.degree. F. and milling to a median particle size diameter of less than or equal to 20 microns.
    Type: Grant
    Filed: December 13, 1995
    Date of Patent: February 3, 1998
    Inventors: Donald W. Clark, C. William Cornelssen