Patents by Inventor Robert John Hillermeier

Robert John Hillermeier 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).

  • Dental compositions
    Patent number: 4108978
    Abstract: Oral hygiene compositions containing 1-50% by weight of a silica xerogel having an average particle size diameter of 25-50, preferably 25-30, microns as sole or principal polishing agent.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: August 22, 1978
    Assignee: Beecham Inc.
    Inventors: Salvatore Mazzanobile, Robert John Hillermeier