Patents by Inventor James Fuerholzer

James Fuerholzer 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).

  • Tagging and identifying asphalt additives
    Patent number: 5306343
    Abstract: A tag is added to an asphalt additive, typically an anti-stripping agent. The additive dye is mixed with other components of an asphalt composition and melt processed at 300.degree. F. (149.degree. C.) or above to produce an asphalt composition. Presence of the tag to identify presence of the additive is performed by dissolving the asphalt portion of the composition in a water-immiscible solvent and then extracting the tag in an acidic aqueous solution and developing a color with a diazo compound.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: April 26, 1994
    Assignee: Morton International, Inc.
    Inventors: Walter A. Richardson, III, Alejandro Zimin, Sr., James Fuerholzer, Michael R. Friswell, Michael P. Hinton, Peter A. Caputo