Patents by Inventor Frederick G. Duerr

Frederick G. Duerr 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).

  • Suspension-enhancing adhesive additive for paper manufacturing, liquid adhesive composition using same, and method of preparing liquid adhesive composition
    Patent number: 5512618
    Abstract: A suspension-enhancing adhesive additive is described for an aqueous, starch-containing, liquid adhesive to be used in manufacturing corrugated paperboard. The additive includes a suspension-enhancing agent with a synthetic liquid polymer component. The polymer component is emulsifiable in the adhesive, and is capable of enhancing suspension of such starch. The polymer component may be based on at least one acrylic-acid monomer, and may be a copolymer based on an acrylic-acid monomer and an aromatic monomer substituted with an acrylate compound. The agent may also include an effective amount of an alcohol-ester coalescing agent. Also described is a liquid adhesive composition for manufacturing corrugated paperboard, which composition incorporates the additive. Also described is a method of preparing a starch-based, liquid adhesive composition for manufacturing corrugated paperboard.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: April 30, 1996
    Assignee: Enviro-Chem, Inc.
    Inventor: Frederick G. Duerr