Patents by Inventor Walter K. Zwicker

Walter K. Zwicker 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).

  • Method for fabricating superconductors by sol-gel process
    Patent number: 5106828
    Abstract: Superconducting oxides in the A, B, Cu oxide ternary system, where A is yttrium or a rare earth and B is an alkaline earth, are formed as thin films on a substrate by a sol-gel technique.
    Type: Grant
    Filed: July 20, 1987
    Date of Patent: April 21, 1992
    Assignee: North American Philips Corporation
    Inventors: Rameshwar N. Bhargava, William N. Osborne, Walter K. Zwicker
  • Sol-gel process for producing liminescent thin film, and film so produced and devices utilizing same
    Patent number: 4931312
    Abstract: Luminescent thin films are produced by a sol-gel process in which a gellable liquid is applied to a substrate to form a thin film, gelled and heated to remove volatile constituents and form a polycrystalline luminescent material.
    Type: Grant
    Filed: October 20, 1988
    Date of Patent: June 5, 1990
    Assignee: North American Philips Corporation
    Inventors: Dagobert M. de Leeuw, Walter K. Zwicker, Rameshwar N. Bhargava
  • Thin film capacitors and method of making the same
    Patent number: 4631633
    Abstract: A thin film capacitor is formed of a thin crystalline electrically insulative or semiconductive substrate. With the insulative substrate a thin conductive metal layer is deposited on the substrate and a thin film of a crystalline strontium barium niobate deposited on the thin conductive metal layer so that its 2.77.ANG. spaced atomic planes are oriented in a non-perpendicular manner to the substrate and an additional thin conductive layer is deposited on the surface of the strontium barium niobate film. When a semiconductive substrate is employed the strontium barium niobate film is deposited directly on the substrate. These capacitors exhibit a low temperature coefficient of capacitance and a high capacitance density.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: December 23, 1986
    Assignee: North American Philips Corporation
    Inventors: Avner A. Shaulov, Stanley J. Lukasik, Myron H. Frommer, Walter K. Zwicker
  • Metallized rare earth garnet and metal seals to same
    Patent number: 4615951
    Abstract: A reliable garnet to metal hermetic seal is obtained by metallizing the garnet with successive sputtered layers of tantalum or titanium, molybdenum or tungsten and nickel, followed by soldering or brazing the metallized garnet to a metal member.
    Type: Grant
    Filed: September 23, 1985
    Date of Patent: October 7, 1986
    Assignee: North American Philips Corporation
    Inventors: Robert L. Bronnes, James K. McKinlay, Richard C. Sweet, Walter K. Zwicker
  • Metallized rare earth garnet and metal seal to same
    Patent number: 4559280
    Abstract: A reliable garnet to metal hermetic seal is obtained by metallizing the garnet with successive sputtered layers of tantalum or titanium, molybdenum or tungsten and nickel, followed by soldering or brazing the metallized garnet to a metal member.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: December 17, 1985
    Assignee: North American Philips Corporation
    Inventors: Robert L. Bronnes, James K. McKinlay, Richard C. Sweet, Walter K. Zwicker