Patents by Inventor Marvin L. Hopper

Marvin L. Hopper 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).

  • Supercritical fluid extraction enhancer
    Patent number: 5151188
    Abstract: A method for enhancing supercritical fluid extraction of sample matrices which contain water. The method involves mixing the samples with an extraction enhancing aid comprising flux-calcined diatomaceous earth which increases the permeability of the sample in a supercritical fluid and controls water during the extraction procedure.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: September 29, 1992
    Assignee: The Government of the United States of America, as represented by the Secretary of the Department of Health and Human Services
    Inventors: Marvin L. Hopper, Jerry W. King