Patents by Inventor Ronald V. Petrella

Ronald V. Petrella 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).

  • Polycarbonate containing a metal salt of a perhalometalate as an ignition depressant
    Patent number: 4366283
    Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of a metal salt of a perhalometalate complex, e.g., the potassium salt of perfluorotitanate, resists combustion upon exposure to a low temperature ignition source.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: December 28, 1982
    Assignee: The Dow Chemical Company
    Inventors: Lowell S. Thomas, Ronald V. Petrella
  • Polycarbonate containing an aromatic sulfonamide as an ignition depressant
    Patent number: 4254015
    Abstract: A polycarbonate such as a bisphenol-A homopolycarbonate containing a small amount of a metal salt of an aromatic sulfonamide, e.g., the sodium salt of saccarin or a derivative thereof, resists combustion upon exposure to a low temperature ignition source.
    Type: Grant
    Filed: January 22, 1979
    Date of Patent: March 3, 1981
    Assignee: The Dow Chemical Company
    Inventors: Lowell S. Thomas, Ronald V. Petrella