Patents by Inventor Earnest L. Johnston

Earnest L. Johnston 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).

  • Low temperature catalytic oxidation of chlorinated compounds to recover chlorine values using chromium-impregnated supported catalysts
    Patent number: 3989807
    Abstract: Substantially all of the chlorine values, e.g., chlorine, are recovered from reactant feeds of chlorinated organic compounds, e.g., hexachlorobenzene and hexachlorobutadiene, by an improved process involving catalytic oxidation at temperatures below 500.degree. C and more typically below about 450.degree. C using a catalyst of a chromium salt or oxide impregnated on a support.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: November 2, 1976
    Assignee: Vulcan Materials Company
    Inventor: Earnest L. Johnston