Patents by Inventor Paul R. Demko

Paul R. Demko 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).

  • Corrugating adhesive compositions containing thermoplastic polymer, thermosetting resin, and starch
    Patent number: 4018959
    Abstract: Improved adhesive compositions useful in the manufacturing of corrugated boards are disclosed; said compositions being comprised of a mixture of: (a) a crosslinkable water dispersible polymer, (b) an ungelatinized starch, (c) a urea-formaldehyde resin, (d) an acidic metal salt, and (e) water.
    Type: Grant
    Filed: December 10, 1975
    Date of Patent: April 19, 1977
    Assignee: National Starch and Chemical Corporation
    Inventors: Paul R. Demko, Frank J. Washabaugh, Robert H. Williams