Patents by Inventor David Robert Marshall

David Robert Marshall 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).

  • Anaesthetic steroids of the androstane series and process for preparing same
    Patent number: 3989686
    Abstract: Anaesthetic steroids of the androstane and 19-norandrostane series are described, the steroids possessing a 3.alpha.-hydroxy group, a 17.alpha.-hydrogen atom and at the 17.beta.-position a --COSH or esterified --COSH group.
    Type: Grant
    Filed: September 13, 1974
    Date of Patent: November 2, 1976
    Assignee: Glaxo Laboratories Limited
    Inventors: Gordon Hanley Phillipps, David Robert Marshall