Patents by Inventor Charles J. Colwell

Charles J. Colwell 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).

  • Method and apparatus for reclaiming contaminated liquid
    Patent number: 3977972
    Abstract: Seal oil contaminated with H.sub.2 S has air or N.sub.2 bubbled therethrough for reducing the H.sub.2 S content of the liquid. The bubbling of the gas through the contaminated liquid is achieved by way of a novel two-state sparger unit situated in a container which receives the contaminated liquid, this container being vented at an upper portion to the outer atmosphere and being connected with a pipe which withdraws decontaminated liquid from the container.
    Type: Grant
    Filed: April 2, 1975
    Date of Patent: August 31, 1976
    Assignee: Exxon Research and Engineering Company
    Inventors: Heinz P. Bloch, Charles J. Colwell