Patents by Inventor Williem J. Crama

Williem J. Crama 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).

  • Process for the preparation of a ferronickel concentrate
    Patent number: 4490174
    Abstract: A ferronickel concentrate is produced by reducing a lateritic ore comprising less than 1.5% w of nickel at a temperature of from 920.degree. to 1120.degree. C. with a CO/CO.sub.2 mixture in the presence of a S-compound, such as Na.sub.2 SO.sub.4 or FeSO.sub.4 or FeS, and subjecting the reduced product to magnetic separation.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: December 25, 1984
    Inventors: Williem J. Crama, Albertus H. Baas