Patents by Inventor Asit R. Chaudhuri

Asit R. Chaudhuri 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).

  • Chemically resistant refractory fiber
    Patent number: 4558015
    Abstract: A composition for forming a high temperature, acid and alkali resistant refractory fiber. The compositional formulation, by weight, is 56-76% silica, 12-33% alumina, and 3-22% zirconia. These fibers are chemically resistant in both acidic and alkaline environments even when heat treated to temperatures exceeding 500.degree. F. (260.degree. C.) in such environments.
    Type: Grant
    Filed: February 4, 1985
    Date of Patent: December 10, 1985
    Assignee: Manville Service Corporation
    Inventors: Wendell G. Ekdahl, Asit R. Chaudhuri, William C. Miiller
  • High temperature refractory fiber
    Patent number: 4555492
    Abstract: A composition for forming a high temperature, alkali resistant refractory fiber. The compositional formulation, by weight, is 46-52% silica, 32-38% alumina, 13-18% zirconia with a silica to zirconia ratio in the range from 2.6 to 3.8. These fibers have a maximum service temperature in the range of 2550.degree. F. (1400.degree. C.) to 2650.degree. F. (1455.degree. C.) and exhibit better shrinkage resistance than similarly rated commercially available refractory fiber.
    Type: Grant
    Filed: March 1, 1984
    Date of Patent: November 26, 1985
    Assignee: Manville Service Corporation
    Inventors: Wendell G. Ekdahl, Asit R. Chaudhuri, William C. Miiller