Patents by Inventor Andrew R. Lechuga

Andrew R. Lechuga 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).

  • Mercury brine sludge treatment
    Patent number: 4381288
    Abstract: A process is provided for treating brine sludge to render it suitable for ecologically safe disposal by removing therefrom leachable mercury impurities. The process comprises dewatering the sludge and conveying the dewatered sludge through a series of water washings to remove therefrom leachable mercury to render it suitable for land fill disposal.
    Type: Grant
    Filed: October 15, 1981
    Date of Patent: April 26, 1983
    Assignee: Stauffer Chemical Company
    Inventors: Samuel Weiss, Andrew R. Lechuga