Patents by Inventor Sunil K. Dutta

Sunil K. Dutta 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).

  • Transparent ultrafine grained ceramics
    Patent number: 4029755
    Abstract: A pressure sintering process for the fabrication of ultrafine grained cercs having improved strength and enhanced transparency comprising the cold compressing of a ceramic oxide powder having a cubic crystal structure, removing undesired gases, raising to a temperature at which full density of the compact can be obtained in isothermal increments of about 50.degree. under elevated pressures while maintaining the temperature at each incremental increase for a period of about 50-60 minutes, and recovering the product.
    Type: Grant
    Filed: April 11, 1973
    Date of Patent: June 14, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: George E. Gazza, Sunil K. Dutta
  • Hot pressing of reaction sintered CaB.sub.6
    Patent number: 4017577
    Abstract: A method for the production of high density compacts of calcium hexaboride omprising the gradual heating of stoichiometric quantities of calcium oxide and boron powder to a temperature of approximately 1500.degree. C and maintaining that temperature for a period of about 30 minutes to produce calcium hexaboride, applying a pressure of about 5500 psi, and maintaining both temperatures and pressures for about 90 minutes.
    Type: Grant
    Filed: February 15, 1974
    Date of Patent: April 12, 1977
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Sunil K. Dutta