Patents by Inventor Roberta A. Ravagnani

Roberta A. Ravagnani 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
    Patent number: 7393564
    Abstract: A vulcanizable rubber composition having improved adhesion and adhesion retention properties with steel reinforcement includes up about 10 pbw of a compound selected from aminosilanes and/or mercaptosilanes per 100 parts of the rubber component in the rubber composition. The silane component can be incorporated into the rubber composition prior to curing. Composite structures and methods for providing the rubber composition also are provided.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: July 1, 2008
    Assignee: Bridgestone Firestone North American Tire, LLC
    Inventors: William L. Hergenrother, Steven E. Schonfeld, Roberta A Ravagnani, legal representative, Frederick J. Ravagnani
  • 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
  • Rubber compositions and articles thereof having improved metal adhesion
    Publication number: 20070010606
    Abstract: A vulcanizable rubber composition having improved adhesion and adhesion retention properties with steel reinforcement includes up about 10 pbw of a compound selected from aminosilanes and/or mercaptosilanes per 100 parts of the rubber component in the rubber composition. The silane component can be incorporated into the rubber composition prior to curing. Composite structures and methods for providing the rubber composition also are provided.
    Type: Application
    Filed: June 14, 2006
    Publication date: January 11, 2007
    Inventors: William Hergenrother, Steven Schonfeld, Frederick Ravagnani, Roberta Ravagnani
  • Rubber compositions and articles thereof having improved metal adhesion and metal adhesion retention with bright steel
    Publication number: 20050119383
    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: Application
    Filed: January 5, 2005
    Publication date: June 2, 2005
    Inventors: William Hergenrother, Steven Schonfeld, Frederick Ravagnani, Roberta Ravagnani
  • Rubber compositions and articles thereof having improved metal adhesion and metal adhesion retention with bright steel
    Publication number: 20040122180
    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: Application
    Filed: December 18, 2002
    Publication date: June 24, 2004
    Applicant: Bridgestone/Firestone North American Tire, LLC
    Inventors: William L. Hergenrother, Steven E. Schonfeld, Frederick J. Ravagnani, Roberta A. Ravagnani