Patents by Inventor Allen R. Firestone

Allen R. Firestone 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).

  • Solid oral preparations of urea hydrogen peroxide without glycerol
    Patent number: 4302441
    Abstract: Solid oral preparations comprising active urea hydrogen peroxide without glycerol are effective in countering acid formed from fermentable carbohydrates in dental plaques.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: November 24, 1981
    Assignee: Hans R. Muhlemann
    Inventors: Hans R. Muhlemann, Allen R. Firestone, Thomas Imfeld