Patents by Inventor C. P. Keegan

C. P. Keegan 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 for the remediation of contaminated particulate material
    Patent number: 5436384
    Abstract: A method for segregating fines from the clean coarse fraction of the soil, preparing the contaminated fines for subsequent processing, and then separating the contaminants from the clean fines. The process produces a small, highly concentrated contaminanth fraction and a large fraction of clean soil. Metals, metallic compounds, and/or radioactive contaminants are removed from the fine fraction using either gravity separation, multistage gravity separation, a centrifugal jig, regular magnetic or paramagnetic separation using a high gradient magnetic separator, and/or a superconducting separator. Preparation of the fines requires selective segregation of the targeted particles size range and the removal of interfering soil fractions, and vegetation such as root hairs. This preparation is accomplished by a combination of attrition scrubbing, countercurrent jigging, and screening.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: July 25, 1995
    Assignee: Westinghouse Elec. Corp.
    Inventors: David C. Grant, Edward J. Lahoda, C. P. Keegan