Patents by Inventor Eberhard Findeisen

Eberhard Findeisen 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 of manufacturing cast tungsten carbide spheres
    Patent number: 5089182
    Abstract: To develop a process for manufacturing cast tungsten carbide spheres, without any content of spattering material, as solid spheres with a bulk weight of 0.5-11.5 g/cm.sup.3 for cast tungsten carbide spheres from a screen fraction, and with a granular distribution of 40 .mu.m to 2,000 .mu.m, tungsten carbide is heated to about 150.degree.-300.degree. C. above the melting point, and then the cast tungsten carbide is smelted and granulated in stationary inert gas.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: February 18, 1992
    Inventors: Eberhard Findeisen, Klaus Frank, Wilfried Becker, Fritz Muller