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:
Mar. 19, 2013
Filed:
Sep. 10, 2009
Applicants:
Richard D. Bertram, Witney, GB;
Peter J. Dowding, Wantage, GB;
Peter D. Watts, Abingdon, GB;
Inventors:
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C11D 7/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of reducing asphaltene precipitation or 'black paint' in an engine is disclosed. The method includes the step of lubricating the engine with a lubricating oil composition comprising: an oil of lubricating viscosity in a major amount; and, a salicylate detergent system in a minor amount comprising one or more neutral or overbased alkaline earth metal Chydrocarbyl substituted salicylates.