Patents by Inventor Viswanathan Venkatswaren

Viswanathan Venkatswaren 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 making silicon carbide ceramic fibers
    Patent number: 5354527
    Abstract: A method for forming a polycrystalline ceramic fiber which comprises blending about 5 to about 25 weight percent polymer, about 70 to about 95 weight percent silicon carbide powder and greater than 1 weight percent sintering aid; forming a fiber from the blend; and sintering the formed fiber. Preferably, the sintering aid is boron carbide. In addition, the fiber is preferably pre-sintered at a first temperature of from about 1700.degree. C. to 2300.degree. C. and then subsequently sintered at a second temperature of approximately 2000.degree. C. to about 2300.degree. C.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: October 11, 1994
    Assignee: The Carborundum Company
    Inventors: Francis J. Frechette, Roger S. Storm, Viswanathan Venkatswaren, Michael J. Andrejcak, Jonathan J. Kim