Patents by Inventor Keith Cheuklap Lee

Keith Cheuklap Lee 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 destruction of halogenated organic compounds in solids
    Patent number: 7488863
    Abstract: The invention provides processes for decontamination of organic halides in asphalt-containing wastes, such as PCBs in asphaltic potting compounds. The processes may use hydrocarbon solvents to dissolve the asphaltic waste, and an alkali metal reactant, such as a sodium dispersion, to destroy the organic halides in the dissolved mixture.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: February 10, 2009
    Assignee: Powertech Labs, Inc
    Inventors: Ian Gordon Norman Wylie, Nicola Dominelli, Keith Cheuklap Lee
  • Process for destruction of halogenated organic compounds in solids
    Publication number: 20030120127
    Abstract: The invention provides processes for decontamination of organic halides in asphalt-containing wastes, such as PCBs in asphaltic potting compounds. The processes may use hydrocarbon solvents to dissolve the asphaltic waste, and an alkali metal reactant, such as a sodium dispersion, to destroy the organic halides in the dissolved mixture.
    Type: Application
    Filed: October 24, 2002
    Publication date: June 26, 2003
    Inventors: Ian Gordon Norman Wylie, Nicola Dominelli, Keith Cheuklap Lee