Patents by Inventor Jean A. H. de Pruneda

Jean A. H. de Pruneda 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).

  • Reusable crucible for containing corrosive liquids
    Patent number: 5383981
    Abstract: A reusable, non-wetting, corrosion-resistant material suitable for containment of corrosive liquids is formed of a tantalum or tantalum alloy substrate that is permeated with carbon atoms. The substrate is carburized to form surface layers of TaC and Ta.sub.2 C, and then is heated at high temperature under vacuum until the carbon atoms in the carbide layers diffuse throughout the substrate to form a solid solution of carbon atoms randomly interspersed in the tantalum or tantalum alloy lattice.
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: January 24, 1995
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventor: Jean A. H. de Pruneda