Patents by Inventor Rodica S. Hida

Rodica S. Hida 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).

  • Sialon composition
    Patent number: 5453232
    Abstract: A composition containing at least 70 weight percent of a beta-prime sialon compound and at least about 27 weight percent of a solid solution is disclosed. The solid solution contains from 2 to 50 weight percent of alpha silicon nitride, from 0.5 to 14 weight percent of aluminum nitride, and from 97.5 to 36 weight percent of alpha alumina.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: September 26, 1995
    Assignee: Benchmark Structural Ceramic Corporation
    Inventors: George T. Hida, Rodica S. Hida, Cezar C. Delcea
  • Sialon precursor composition
    Patent number: 5221647
    Abstract: A precursor material is disclosed. This precursor material is comprised of at least about 16 weight percent of beta-sialon, from about 54 to about 28 weight percent of alumina, from about 0 to about 8 weight percent of aluminum nitride, from about 0 to about 25 weight percent of silicon nitride, and from about 30 to about 24 weight percent of free silicon.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: June 22, 1993
    Assignee: Benchmark Structural Ceramics Corporation
    Inventors: George T. Hida, Rodica S. Hida
  • Sialon composition
    Patent number: 5192720
    Abstract: A process for heat-treating a composite material is disclosed. The composite material contains alumina, free silicon, and a beta-sialon material of the formula Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, wherein z is from 2.5 to 3.5. In the heat treatment process, the composite material is subjected to temperatures of 800-1,000 degrees centigrade, 1,240 to 1,260 degrees centigrade, and 1,400 to 1,450 degrees centigrade for various times and under specified conditions.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: March 9, 1993
    Assignee: Benchmark Structural Ceramics Corporation
    Inventors: George T. Hida, Rodica S. Hida, Cezar C. Delcea
  • Novel sialon composition
    Patent number: 5030600
    Abstract: A novel composite mateial consisting of at least 70 weight percent of single-phase beta sialon and at least 20 weight percent of alpha-alumina is disclosed. The beta-sialon is of the formula Si.sub.6-z Al.sub.z -.sub.z N.sub.8-z, wherein z is from 2.5 to 3.5. The composite material contains no silicon nitride. Sintered products made from such composite material contain no glassy phase, contain no silicon nitride, and have superior thermal and mechanical properties.
    Type: Grant
    Filed: June 7, 1990
    Date of Patent: July 9, 1991
    Assignee: Benchmark Structural Ceramics Corp.
    Inventors: George T. Hida, Rodica S. Hida