Patents by Inventor Darrel D. Walker

Darrel D. Walker 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).

  • Nuclear waste solutions
    Patent number: 4654173
    Abstract: High efficiency removal of technetium values from a nuclear waste stream is achieved by addition to the waste stream of a precipitant contributing tetraphenylphosphonium cation, such that a substantial portion of the technetium values are precipitated as an insoluble pertechnetate salt.
    Type: Grant
    Filed: November 21, 1985
    Date of Patent: March 31, 1987
    Inventors: Darrel D. Walker, Martha A. Ebra