Patents by Inventor William C. Currey

William C. Currey 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).

  • Identification marking of oils
    Patent number: 4764290
    Abstract: Hydrophilic dye is added to oil for providing identification to the oil. The dye is dispersed in the oil in the form of polymolecular particles less than 1 mm. in diameter, for example, as an emulsion. Accordingly, the sample of oil may be exposed to a polar solvent for the dye particles, to cause the dye particles to dissolve in the polar solvent to exhibit an intensified color, when compared with the particles in the oil.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: August 16, 1988
    Assignee: National Identification Laboratories, Inc.
    Inventor: William C. Currey