Patents by Inventor Franz R. Brotzen

Franz R. Brotzen 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: 6002259
    Abstract: A electrostatic adhesion tester for thin film conductors. In one embodiment, a device is provided for testing the adhesion strength of a thin film conductor that has been formed upon a substrate. The device includes an adhesion tester that is primarily comprised of a conducting portion. The conducting portion is applied to the thin film conductor so that it does not physically contact the thin film conductor, but leaves a small space there between. A power supply may further be provided for coupling to either the adhesion tester, the thin film conductor, or both in order to create a potential difference between the conducting portion and the thin film conductor. The potential difference creates an electric field between the conducting portion and the thin film conductor that induces stress in the thin film conductor.
    Type: Grant
    Filed: January 20, 1998
    Date of Patent: December 14, 1999
    Assignee: Rice University
    Inventors: Alfred J. Griffin, Jr., Franz R. Brotzen, Daniel L. Callahan, Haining S. Yang
  • Patent number: 4881465
    Abstract: A non-toxic shotgun pellet having ballistic characteristics similar to those of lead shot is made up of particles of a first alloy, containing primarily ferrotungsten, suspended in a matrix of a second alloy, containing primarily lead. The relative amounts of lead and ferrotungsten are selected to minimize cost while keeping the overall lead content to forty percent or less, by weight, to avoid toxicity. The first alloy is formed by diluting the ferrotungsten with iron or steel and carbon at temperatures on the order of 1800.degree. C. in an inert gas environment. The alloy is quenched and then crushed into particles over which is poured the second alloy comprising lead, tin and antimony in order to suspend the first alloy particles in the second alloy mixture.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: November 21, 1989
    Inventors: Robert C. Hooper, Franz R. Brotzen