Patents by Inventor Frederick A. Falk

Frederick A. Falk 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).

  • Urethane-modified rosin esters
    Patent number: 4693846
    Abstract: The present invention encompasses a urethane-modified rosin ester which is derived from an isocyanate and a hydroxyl-functional rosin esterification product of a dimerized rosin. The urethane-modified rosin esters, having a high softening point and good compatibility with hydrocarbon solvents, good gelability and good squalene resistance, are particularly suitable as binders for inks such as fast conversion lithographic inks.
    Type: Grant
    Filed: May 9, 1986
    Date of Patent: September 15, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Robert M. Piccirilli, Roger M. Christenson, Frederick A. Falk, Joseph M. Makhlouf
  • Phenolic-modified rosin esters
    Patent number: 4639492
    Abstract: The present invention encompasses a phenolic-modified rosin ester which is derived from a rosin esterification product of a dimerized rosin and a phenolic resin. The phenolic-modified rosin esters, having a high softening point and good compatibility with hydrocarbon solvents and good gelability, are particularly suitable as binders for inks such as lithographic inks.
    Type: Grant
    Filed: August 9, 1985
    Date of Patent: January 27, 1987
    Assignee: PPG Industries, Inc.
    Inventors: Joseph M. Makhlouf, Frederick A. Falk, Robert M. Piccirilli