Patents by Inventor Thomas M. Campbell

Thomas M. Campbell 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 continuous multistage degasification of liquid sulfur
    Patent number: 4131437
    Abstract: H.sub.2 S is removed continuously from H.sub.2 S-rich liquid sulfur by contacting same with an H.sub.2 S-lean carrier gas in more than one discrete contacting stage. Preferably, the liquid sulfur is recirculated in at least one discrete contacting stage to provide better contacting between the sulfur and the carrier gas within said stage.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: December 26, 1978
    Assignee: Exxon Research & Engineering Co.
    Inventors: Thomas M. Campbell, William H. Ringler, Howard Lerner