Patents by Inventor David P. Perry

David P. Perry 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).

  • Concentration and/disposal of non-volatile inorganic contaminants from refinery waste water streams
    Patent number: 5376262
    Abstract: Selenium and other non-volatile inorganic contaminants in refinery waste water are removed from said waste water and disposed of by a process comprising subjecting the contaminated waste water stream to a non-chemical concentration process producing a contaminants concentrate stream and a clean water stream and passing the contaminants concentrate stream to a coker unit wherein it is used as coker elutriant to quench the coke.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: December 27, 1994
    Assignee: Exxon Research and Engineering Company
    Inventor: David P. Perry