Patents by Inventor Sankar D. Gupta

Sankar D. Gupta 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).

  • Ceramic fibre and process therefor
    Patent number: 5443771
    Abstract: A process is described for producing ceramic fibres composed of titanium boride, zirconium boride or hafnium boride. The boride fibres are obtained by reacting a boron oxide precursor fibre with a titanium halide, zirconium halide or hafnium halide gas in the presence of hydrogen. Ceramic titanium, zirconium or hafnium nitride fibres may also be produced by the process, by means of the additional presence of nitrogen gas in the gas phase. The process is conducted at temperature higher than 500.degree. C.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: August 22, 1995
    Inventor: Sankar D. Gupta