Patents by Inventor Raymond D. Dandeneau

Raymond D. Dandeneau 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).

  • Silica chromatographic column
    Patent number: 4293415
    Abstract: An open tubular or capillary chromatographic column made from drawn silica tubing having an exterior coating for protection from abrasion and moisture and means for holding it in a desired configuration.
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: October 6, 1981
    Assignee: Hewlett-Packard Company
    Inventors: Paul F. Bente, III, Ernest H. Zerenner, Raymond D. Dandeneau