Patents by Inventor Thomas D. Doyle

Thomas D. Doyle 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).

  • Liquid chromatographic chiral stationary phase
    Patent number: 4919803
    Abstract: A novel packing material for liquid chromatographic use is disclosed. This packing material is prepared by covalently bonding (S)- or (R)-6-methoxy-.alpha.-methyl-2-naphthaleneacetic acid (naproxen) to aminopropylsilanized silica. The resulting chiral stationary phase is effective for the resolution of enantiomeric (RS)-naproxen, and of other racemic .alpha.-methylarylacetic acids.
    Type: Grant
    Filed: December 9, 1988
    Date of Patent: April 24, 1990
    Assignee: The United States of America as represented by the Secretary of the Department of Health and Human Services
    Inventors: Thomas D. Doyle, Charlotte A. Brunner, Edward Smith