Patents by Inventor Irene DeFilippi

Irene DeFilippi 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 preparing chemically modified micas for removal of cesium salts from aqueous solution
    Patent number: 6114269
    Abstract: A chemically modified mica composite formed by heating a trioctahedral mica in an aqueous solution of sodium chloride having a concentration of at least 1 mole/liter at a temperature greater than 180 degrees Centigrade for at least 20 hours, thereby replacing exchangeable ions in the mica with sodium. Formation is accomplished at temperatures and pressures which are easily accessed by industrial equipment. The reagent employed is inexpensive and non-hazardous, and generates a precipitate which is readily separated from the modified mica.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: September 5, 2000
    Inventors: Stephen Frederic Yates, Irene DeFilippi, Romulus Gaita, Abraham Clearfield, Lyudmila Bortun, Anatoly Bortun