Patents by Inventor Samuel J. Leonardi

Samuel J. Leonardi 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).

  • Lubricant compositions stabilized against ultra-violet degradation
    Patent number: 4226733
    Abstract: Lubricant compositions are provided which contain an effective amount of a nickel complex, e.g., a nickel phenol-phenolate derivative of a phenol sulfide for stabilizing said compositions against ultra-violet degradation.
    Type: Grant
    Filed: November 17, 1978
    Date of Patent: October 7, 1980
    Assignee: Mobil Oil Corporation
    Inventors: Eldon L. Armstrong, Samuel J. Leonardi
  • Lubricant compositions
    Patent number: 4101430
    Abstract: Lubricant compositions are provided containing a stabilizing amount against oxidative degradation of an organo sulfur-containing nickel complex.
    Type: Grant
    Filed: February 15, 1977
    Date of Patent: July 18, 1978
    Assignee: Mobil Oil Corporation
    Inventors: Milton Braid, Samuel J. Leonardi