Patents by Inventor Ronald V. Perkins

Ronald V. Perkins 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 membrane extraction of hydrolysis contaminates
    Patent number: 4891137
    Abstract: A process removes FMOC--OH which is an undesirable by-product of the derivatization of amino acids by FMOC. The process uses a silicone rubber membrane extractor cell. The sample containing the FMOC--OH is held in a silicone rubber tubing, while pentane flows past the outside of the tube; the FMOC--OH is thus extracted from the sample into the pentane. The process is integrated into a conventional high performance liquid chromatography system and is readily automated.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: January 2, 1990
    Assignee: Spectra-Physics, Inc.
    Inventors: Andre Nohl, Ronald V. Perkins