Patents by Inventor Roy Ewald

Roy Ewald 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).

  • Antibiotic lactone compound
    Patent number: 4753959
    Abstract: The compound of formula I ##STR1## known as S 39163/F-I which is effective e.g. as an antimicrobial and against herpes viruses.
    Type: Grant
    Filed: December 1, 1986
    Date of Patent: June 28, 1988
    Assignee: Sandoz Ltd.
    Inventors: Hans Tscherter, Hans Hofmann, Roy Ewald, Michael M. Dreyfuss