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:
Dec. 25, 2018
Filed:
Dec. 14, 2015
Shell Oil Company, Houston, TX (US);
Alexander Mark Robert James Hellawell, Cambridge, GB;
Robert Wilkinson, Cambridge, GB;
Alexander Peter Dirk Massely, Cambridge, GB;
Robert Moir, Cambridge, GB;
Stuart Browning, Cambridge, GB;
Richard Thomas Bown, Cambridge, GB;
Sravani Gullapalli, Houston, TX (US);
SHELL OIL COMPANY, Houston, TX (US);
Abstract
Lubricating composition comprising (i) base oil and (ii) a Verkade base compound having the formula (1): wherein R, Rand Rare each independently selected from hydrogen and saturated or unsaturated, straight chain or branched, C-Calkyl groups. The lubricating composition of the present invention exhibits improved base number retention and oxidative stability, particularly in the presence of a biofuel such as fatty acid alkyl ester.