Patents by Inventor Edward J. Ruskowski

Edward J. Ruskowski 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).

  • Thermoplastic syntactic foams and their preparation
    Patent number: 5691390
    Abstract: A low-density, porous material is prepared by mixing together microballoons and an oligomeric precursor to a polyesterimide polymer. The oligomeric precursor has an initial viscosity sufficiently low that it can flow and wet the microballoons when first heated to a polymerization processing temperature, and thereafter polymerize. Fibers may be controllably incorporated into the material during processing to impart specific properties, and air may be controllably incorporated into the material during processing to further decrease its density.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: November 25, 1997
    Assignee: McDonnell Douglas Corporation
    Inventors: Edward S. Harrison, Edward J. Ruskowski, James Melquist
  • Thermoplastic syntactic foams and their preparation
    Patent number: 5532295
    Abstract: A low-density, porous material is prepared by mixing together microballoons and an oligomeric precursor to a polyetherimide polymer. The oligomeric precursor has an initial viscosity sufficiently low that it can flow and wet the microballoons when first heated to a polymerization processing temperature, and thereafter polymerize. Fibers may be controllably incorporated into the material during processing to impart specific properties, and air may be controllably incorporated into the material during processing to further decrease its density.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: July 2, 1996
    Assignee: McDonnell Douglas Technologies Inc.
    Inventors: Edward S. Harrison, Edward J. Ruskowski, James Melquist