Patents by Inventor Robert R. Berks

Robert R. Berks 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).

  • Patent number: 5374384
    Abstract: A novel modeling medium comprises a mixture of an organic ductile wax binder and a mica platelet filler which is mechanically worked while the material is in a semisolid state to evenly distribute the mica platelets throughout the mixture. The material exhibits the characteristics of non-ferrous metal with less density than conventional modeling mediums. It provides the bi-color visual characteristic of metal and may be worked at convenient temperatures.
    Type: Grant
    Filed: September 22, 1992
    Date of Patent: December 20, 1994
    Inventors: Robert R. Berks, Alexander Saunders