Patents by Inventor Donovan S. Duvall

Donovan S. Duvall 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).

  • Intumescent fire extinguishing solutions
    Patent number: 4588510
    Abstract: An aqueous solution useful in extinguishing fires is disclosed comprising diammonium phosphate, a water soluble polyol, a water soluble gas-generating agent, a non-combustible viscosity builder and water; when sprayed upon burning surfaces, the solution intumesces and generates a flame-resistant polymeric foam having a high char value; the foam shuts off the air supply to the burning surface and thereby quickly and effectively extinguishes the fire.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: May 13, 1986
    Assignee: University of Dayton
    Inventors: Ival O. Salyer, Charles W. Griffen, Donovan S. Duvall