Patents by Inventor Roy D. Hudgens

Roy D. Hudgens 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).

  • Diesel engine cooling system compositions
    Patent number: 4717495
    Abstract: A heavy duty supplemental cooling composition for use in diesel engines which comprises a sodium-free buffer, a cavitation liner pitting inhibitor, a metal corrosion and hot surface corrosion inhibitor, a defoamer, a hot surface deposition and scale inhibitor and a detergent. An internal leakage trace element is included to detect leakage into the engine's lubricating oil.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: January 5, 1988
    Assignee: Fleetguard, Inc.
    Inventors: Richard D. Hercamp, Roy D. Hudgens