Patents by Inventor Robert T. Zahradnik

Robert T. Zahradnik 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).

  • Stable stannous fluoride toothpaste compositions
    Patent number: 5716600
    Abstract: The invention is a high humectant, low water, stannous fluoride containing toothpaste composition which maintains the stability and activity of the stannous fluoride over time, and methods for the preparation thereof. Stannous fluoride combined with from about 70 to about 92% humectant, and water present at less than 10% by weight, provides a stable toothpaste which avoids stannous fluoride degradation with time.
    Type: Grant
    Filed: November 14, 1995
    Date of Patent: February 10, 1998
    Assignee: Professional Dental Technologies, Inc.
    Inventors: Robert T. Zahradnik, Sima Sarker
  • Neutral topical sodium fluoride gel
    Patent number: 4540576
    Abstract: A neutral topical sodium fluoride gel is disclosed which comprises a thickened aqueous solution of sodium fluoride buffered to maintain a pH of from about 6 to 8, wherein the thickener is a mixture of xanthan gum and a soluble salt of an acrylic acid polymer.
    Type: Grant
    Filed: January 24, 1984
    Date of Patent: September 10, 1985
    Assignee: Johnson & Johnson Dental Products Company
    Inventor: Robert T. Zahradnik