The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 2001
Filed:
Sep. 26, 1994
Douglas H. Henderson, Glen Allen, VA (US);
Ethyl Petroleum Additives, Inc., Richmond, VA (US);
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 0.60 grams of manganese per gallon as at least one cyclopentadienyl manganese tricarbonyl compound, and optionally up to about 15% by volume of aromatic gasoline hydrocarbons, these being proportioned such that the fuel possesses at least the octane qualities and heat contents called for by ASTM Specification D 910-90.