Patents by Inventor Rustum Roy

Rustum Roy 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: 4587172
    Abstract: A low expansion ceramic material has a composition represented by the molecular formula i (Na) j (Zr.sub.2-z Na.sub.4z) k (P.sub.3-x Na.sub.x Si.sub.x)O.sub.12 in which the molar proportions i, j and k are each within the range from about 0.9 to about 1.1, and i+j+k equal 3; and, for molar proportions i, j and k each equal to 1.0, the ceramic composition falls within the area defined by the points A, B, C and D in a quarternary diagram of SiO.sub.2, Na.sub.2 O, P.sub.2 O.sub.5 and ZrO.sub.2, the coordinates of the points being:A: x=0.2, z=0B: x=0.6, z=0C: x=0, z=0.25D: x=0, z=0.125The ceramic material is especially suitable as a substrate for optically reflecting films.
    Type: Grant
    Filed: June 1, 1984
    Date of Patent: May 6, 1986
    Assignee: The Perkin-Elmer Corporation
    Inventors: Rustum Roy, Jaime Alamo
  • Patent number: 4338215
    Abstract: Radioactive waste material, such as that resulting from radioactive weapons plant operation or from nuclear fuel reprocessing, in suitable form, such as radionuclide-containing oxide and/or oxyhydroxide and/or hydroxide particles, is held by a metal or metal "alloy" to an electrically conductive cathodic material upon which the metal or alloy is electrodeposited. In this way the radionuclide species including strontium and/or cesium, which are biologically extremely hazardous, are incorporated into a metal matrix held to a base and may be disposed of, as by underground storage, in such form, which is considered to be more resistant to dissolution by ground water and to damage by mechanical stresses arising from tectonic activity than are glasses or ceramics incorporating radionuclides.
    Type: Grant
    Filed: September 24, 1979
    Date of Patent: July 6, 1982
    Assignee: Kennecott Corporation
    Inventors: Peter T. B. Shaffer, Rustum Roy, Norman H. Macmillan
  • Patent number: 4252865
    Abstract: The invention contemplates a highly solar-energy absorbing device wherein the surface exposed to incident solar energy is a particularly characterized roughness of an amorphous semiconductor material, the particular characterization being that of an array of outwardly projecting structural elements of relatively high aspect ratio and at effective lateral spacings which are or include those in the order of magnitude of wavelengths within the solar-energy spectrum.
    Type: Grant
    Filed: May 24, 1978
    Date of Patent: February 24, 1981
    Assignee: National Patent Development Corporation
    Inventors: Laurence R. Gilbert, Russell F. Messier, Rustum Roy