Patents by Inventor Sonnia C. Rojas

Sonnia C. Rojas 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).

  • Process of monitoring for the reflectivity change in indium phase transition soldering
    Patent number: 4623086
    Abstract: An element is soldered to a heat sink by a flux-free technique in which flux-free solder is first deposited onto the heat sink surface, then the element is placed into position on the surface, then the heat sink is placed into and held at a constant temperature in a pressure controlled chamber to a level below the melting point of the solder while undergoing a plurality of cycles of introduction and purging of an oxygen stripping gas.
    Type: Grant
    Filed: March 11, 1985
    Date of Patent: November 18, 1986
    Assignee: McDonnell Douglas Corporation
    Inventors: Peter L. Tihanyi, Jeffrey S. Mott, Hubert J. Vollmer, Maryanne Sovak, Sonnia C. Rojas