Patents by Inventor Gabriel P. DeMunda

Gabriel P. DeMunda 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).

  • Patent number: 4596716
    Abstract: New porous semiconductor dopant carriers are disclosed together with a method for the diffusion doping of semiconductors by the vapor phase transport of an n or p type dopants, such as phosphorus, arsenic, antimony, boron, gallium, aluminum, zinc, silicon, tellurium, tin and cadmium to the semiconductor host substrate; wherein the dopant source comprises a dopant containing porous, inert, rigid dimensionally stable and thermal shock resistant reaction sintered Si.sub.3 N.sub.4 carrier material.
    Type: Grant
    Filed: June 8, 1983
    Date of Patent: June 24, 1986
    Assignee: Kennecott Corporation
    Inventors: Gabriel P. DeMunda, Richard E. Tressler
  • Patent number: 4525429
    Abstract: New porous semiconductor dopant carriers are disclosed together with a method for the diffusion doping of semiconductors by the vapor phase transport of an n or p type dopant, such as phosphorus, arsenic, antimony, boron, gallium, aluminum, zinc, silicon, tellurium, tin and cadmium to the semiconductor host substrate; wherein the dopant source comprises a dopant containing porous, inert, rigid dimensionally stable and thermal shock resistant carrier comprised of SiC, elemental silicon or mixtures thereof.
    Type: Grant
    Filed: June 8, 1983
    Date of Patent: June 25, 1985
    Assignee: Kennecott Corporation
    Inventors: Gregory A. Kaiser, Gabriel P. DeMunda, Richard E. Tressler
  • Patent number: 4178413
    Abstract: The present invention relates to fiber reinforced carbon and graphite articles that are characterized by a matrix of fibrous carbon material bonded together by a deposited pyrolytic material and having the residue of a carbonized filler material dispersed within the article in contact with the pyrolytic material.Fiber reinforced carbon and graphite articles are produced by(1) Forming reinforcing fibers into a shape without any binder material,(2) Infiltrating the fibers with a pyrolytic material in a manner to deposit pyrolytic material on the fibers and bond together the fibers, to form a bonded body,(3) Subsequently impregnating the bonded body with a carbonizable filler material, and,(4) Curing and carbonizing the filler material.The articles are substantially free of internal cracks and voids and are of high strength even at relatively low densities. As such, the articles are particularly useful in the aerospace industry where strong, lightweight materials are required.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: December 11, 1979
    Assignee: The Carborundum Company
    Inventor: Gabriel P. DeMunda