Patents by Inventor Leon Estrowitz

Leon Estrowitz 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 producing stable divalent scandium
    Patent number: 6126995
    Abstract: A method for producing divalent scandium includes heating, at a mildly elted temperature above 20.degree. C. under reduced pressure, a calcium difluoride crystal sample doped with scandium trifluoride to drive off atmospheric impurities, heating at an intermediate temperature above 150.degree. C. calcium metal under reduced pressure to drive off volatile impurities, heating calcium metal at a migrating below 900.degree. C. to evaporate calcium and to deposit it on the sample, and heating the sample at a diffusion and reaction temperature below 950.degree. C. to diffuse calcium into the sample and to cause formation of the divalent scandium.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: October 3, 2000
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Leon Estrowitz, Charles Marquardt