Patents by Inventor Sherwin P. Malchick

Sherwin P. Malchick 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).

  • Lithographic ink composition and process for making same
    Patent number: 4822419
    Abstract: A lithographic ink has an oil-soluble additive incorporated thereinto, the additive producing beneficial effects, especially with respect to reducing the pH drift of the ink during use. The additive is produced by combining a primary, secondary, tertiary, or quaternary amine with a polybasic organic acid.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: April 18, 1989
    Assignee: BASF Corporation
    Inventors: Louis J. Pepoy, Thomas E. Foye, Sherwin P. Malchick