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:
May. 31, 2016
Filed:
Sep. 24, 2014
Applicant:
Infineum International Limited, Abingdon, GB;
Inventor:
Laura Gregory, Wilts, GB;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M 169/04 (2006.01); C10M 133/00 (2006.01); F02B 43/00 (2006.01); F02B 47/00 (2006.01); F02M 25/00 (2006.01); C10M 161/00 (2006.01); C10M 163/00 (2006.01);
U.S. Cl.
CPC ...
C10M 161/00 (2013.01); C10M 163/00 (2013.01); C10M 2203/1006 (2013.01); C10M 2203/1025 (2013.01); C10M 2205/0285 (2013.01); C10M 2207/023 (2013.01); C10M 2207/129 (2013.01); C10M 2207/262 (2013.01); C10N 2220/027 (2013.01); C10N 2230/04 (2013.01); C10N 2240/102 (2013.01);
Abstract
A trunk piston lubricating oil composition of TBN 20 to 60 comprising (A) a high saturates low sulphur oil of lubricating viscosity in a major amount; (B) an overbased metal hydroxybenzoate detergent additive; (C) a polyisobutene succinic anhydride additive (1-7 mass %); and (D) a meta-linear pentadecyl phenol additive (10.1 to 10 mass %), the weight ratio of (D) to (C) being less than 1 and the combined treat rate of (B), (C) and (D) being 5 to 30%. The composition is useful to improve asphaltene dispersancy when lubricating a medium-speed compression-ignited marine engine fueled by a heavy fuel oil.