Patents by Inventor Joseph P. Tultz

Joseph P. Tultz 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).

  • Precipitated silica pigment for silicone rubber
    Patent number: 4463108
    Abstract: Amorphous precipitated high structure silica pigment useful in the reinforcement of silicone rubber is described. The silica pigment is treated with an aqueous solution of a metal, e.g., calcium and barium, which forms a relatively water insoluble, white or colorless sulfate salt in amounts sufficient to provide at least an equal molar amount of the metal compared to the amount of alkali metal in the silica. Silicone rubber reinforced with such silica pigment exhibits a water swell of less than 4 volume percent.
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: July 31, 1984
    Assignee: PPG Industries, Inc.
    Inventors: Melvin P. Wagner, Joseph P. Tultz, Thomas G. Krivak