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:
Jun. 03, 2003
Filed:
Aug. 10, 2001
Hugh A. McNeil, Seattle, WA (US);
Arthur J. Kiehn, Seattle, WA (US);
Mark Eskridge, Seattle, WA (US);
Bardahl Manufacturing Corporation, Seattle, WA (US);
Abstract
Improved performance of two-cycle and four-cycle engines is achieved by adding to the oil or fuel of such engines a composition that contains a copolymer of an alpha-olefin and a dialkyl fumarate or maleate and/or a synthetic diester compound that has about 30 carbon atoms. For two-cycle engines, the composition preferably contains both chemicals, in addition to an octane booster such as methylcyclopentadienyl manganese tricarbonyl. For four-cycle engines, the composition contains at least one of the copolymer and diester, in addition to a molybdenum or bismuth salt, dimercapto 1,3,4-thiadiazole and sulfur-phosphorous EP and/or chlorinated paraffin. The composition can also act to improve gear and grease lubrication and provide improved lubricity to fuels.