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:
Oct. 06, 2009
Filed:
Jan. 20, 2006
Peter W. Hou, Chesterfield, VA (US);
Dennis J. Malfer, Glen Allen, VA (US);
May Duffield Thomas, Richmond, VA (US);
William J. Colucci, Glen Allen, VA (US);
Peter W. Hou, Chesterfield, VA (US);
Dennis J. Malfer, Glen Allen, VA (US);
May Duffield Thomas, Richmond, VA (US);
William J. Colucci, Glen Allen, VA (US);
Afton Chemical Corporation, Richmond, VA (US);
Abstract
New, highly effective Mannich detergents for use in hydrocarbon fuels are described which reduce engine deposits in spark and compression ignition internal combustion engines. They are Mannich condensation reaction products obtained from reacting: (i) a polyamine having a sterically-hindered primary amino group, (ii) a hydrocarbyl-substituted hydroxyaromatic compound, and (iii) an aldehyde. These Mannich detergent compounds may be dispersed in a liquid carrier to provide a fuel additive concentrate for hydrocarbon engine fuels which effectively control engine deposit formation in intake valves and also other engine regions such as port fuel injectors and combustion chambers.