Patents by Inventor Alf E. Gravem

Alf E. Gravem 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 and apparatus for producing metal powder
    Patent number: 4810284
    Abstract: A method for producing metal powder comprising steps of feeding a molten metal into a closed vessel, atomizing of the metal by inert gas and finally cooling of particles in an atmosphere of inert gas and atomized water is provided.An apparatus for producing metal powder comprises a closed vessel (1) provided with atomizing nozzles (2) and means for providing inert gas, and another set of nozzles (4) for supply of atomized cooling medium located on one or several vertically displaced levels along the internal perimeter of the vessel (1).
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: March 7, 1989
    Assignee: Norsk Hydro a.s.
    Inventors: Lars Auran, Ivar O. Rod, Ole Tangen, Alf E. Gravem