Patents by Inventor Irwin A. Lichtman

Irwin A. Lichtman 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).

  • Silica base defoamer compositions with improved stability
    Patent number: 4021365
    Abstract: Defoamer compositions having improved stability are prepared from hydrophobic silica, quick-chilled amides, and hydrocarbon oil, with oil soluble organic polymers and surface-active additives as optional ingredients. These compositions are useful in defoaming aqueous systems including paper pulp black liquors, water-base paints, and adhesives.
    Type: Grant
    Filed: July 18, 1975
    Date of Patent: May 3, 1977
    Assignee: Diamond Shamrock Corporation
    Inventors: Joseph V. Sinka, Irwin A. Lichtman