Patents by Inventor John F. Sierakowski

John F. Sierakowski 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).

  • Method for stabilizing polyurethane foam using an additive combination of a phenothiazine and at least one co-stabilizer
    Patent number: 4914137
    Abstract: This invention relates to the stabilization of polyurethane foam by using a combination of a phenothiazine with at least a co-stabilizing effective amount of a compound selected from the group consisting of certain dithiocarbamates, thiuramsulfides, mercaptobenzothiazole, phosphites, phosphonites, phenolic antioxidants, pentaerythritol-tetrakis(beta-laurylthiopropionate), 4,4'-thiobis(2-t-butyl-5-methylphenol) and mixtures thereof.
    Type: Grant
    Filed: August 11, 1988
    Date of Patent: April 3, 1990
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Bernard C. Smith, Frank Powell, John F. Sierakowski
  • Extreme pressure additive for lubricants
    Patent number: 3988249
    Abstract: Antimony N-(2-octyl)-N-ethyldithiocarbamate confers extreme pressure properties on lubricants.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: October 26, 1976
    Assignee: Uniroyal Inc.
    Inventors: Richard A. Gencarelli, Keith A. Hughes, John F. Sierakowski