Patents by Inventor Douglas H. Henderson

Douglas H. Henderson 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).

  • Unleaded aviation gasoline
    Patent number: 6238446
    Abstract: Unleaded aviation gasolines having heats of combustion and octane qualities deemed necessary for use under actual service conditions are formed from blends of specified proportions of aviation alkylate, ether blending agent, a cyclopentadienyl manganese tricarbonyl and optionally other appropriate hydrocarbons falling in the gasoline boiling range.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: May 29, 2001
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventor: Douglas H. Henderson
  • Unleaded aviation gasoline
    Patent number: 6187064
    Abstract: Unleaded aviation gasolines of enhanced properties are described. They satisfy at least the octane and heat content specifications of ASTM D 910-90. Also described are unleaded aviation gasolines which satisfy all of the specifications of ASTM D 910-90. The fuels also prevent or at least inhibit exhaust valve recession or wear during use in aviation engines, especially those designed to operate on leaded aviation fuel. The fuels of the invention contain a cyclopentadienyl manganese tricarbonyl compound. Preferably the fuels are made up of a blend of at least about 80% by volume of aviation alkylate gasoline, up to about 10% by volume of a gasoline-soluble dialkyl ether gasoline blending agent, from about 0.25 to about 0.
    Type: Grant
    Filed: September 26, 1994
    Date of Patent: February 13, 2001
    Assignee: Ethyl Petroleum Additives, Inc.
    Inventor: Douglas H. Henderson