Patents by Inventor Lisa J. H. Brasche

Lisa J. H. Brasche 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).

  • Nondestructive detection of an undesirable metallic phase, T.sub.1, during processing of aluminum-lithium alloys
    Patent number: 4947117
    Abstract: A method is disclosed for detecting the T.sub.1 phase in aluminum-lithium alloys through simultaneous measurement of conductivity and hardness. In employing eddy current to measure conductivity, when the eddy current decreases with aging of the alloy, while the hardness of the material continues to increase, the presence of the T.sub.1 phase may be detected.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: August 7, 1990
    Assignee: Iowa State University Research Foundation
    Inventors: Otto Buck, David J. Bracci, David C. Jiles, Lisa J. H. Brasche, Jeffrey E. Shield, Leonard S. Chumbley