Patents by Inventor Roselin E. Peralta

Roselin E. Peralta 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 of making tungsten powder compacts
    Patent number: 5026519
    Abstract: According to a method for making a compact consisting essentially of pure tungsten metal powder, the tungsten metal powder is contacted with an aqueous acid mixture at a sufficient concentration and for a sufficient period of time to etch the surface of the powder and the resulting powder is isostaticly pressed at an ambient temperature at a pressure of from about 18,000 to about 20,000 psi. for a sufficient period of time to form a compact.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: June 25, 1991
    Assignee: GTE Products Corporation
    Inventor: Roselin E. Peralta