Patents by Inventor Frederick J. Ravagnani, deceased

Frederick J. Ravagnani, deceased 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).

  • Rubber compositions and articles thereof having improved metal adhesion and metal adhesion retention with bright steel
    Patent number: 7201944
    Abstract: A vulcanizable rubber composition having improved metal adhesion and metal adhesion retention properties with bright steel, the improvement wherein from about 0.1 to about 10 parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof, per 100 parts of the rubber component in the rubber composition is incorporated into the rubber composition prior to curing. Structural components for a pneumatic tire contain a cured rubber composition, having from about 0.1 to about 10 parts by weight of a compound selected from the group consisting of aminosilanes and mercaptosilanes and mixtures thereof per 100 parts of the rubber component in the rubber composition, incorporated into the rubber compounds prior to curing. A method for improving metal adhesion and metal adhesion retention properties between a vulcanizable rubber composition and bright steel comprises the step of incorporating from about 0.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: April 10, 2007
    Assignee: Bridgestone Firestone North American Tire, LLC
    Inventors: William L. Hergenrother, Steven E. Schonfeld, Roberta A. Ravagnani, legal representative, Frederick J. Ravagnani, deceased