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:
Jan. 25, 2011
Filed:
Feb. 25, 2005
Applicant:
Andrew S Oldfield, Northants, GB;
Inventor:
Andrew S Oldfield, Northants, GB;
Assignee:
Croda Internatonal PLC, Goole, East Yorkshire, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M 129/78 (2006.01); C10M 129/80 (2006.01);
U.S. Cl.
CPC ...
Abstract
An automotive engine oil comprising a base oil and an antiwear additive system comprising an ester. The antiwear additive system preferably further comprises a phosphorus-containing and/or sulphur-containing antiwear additive. The antiwear additive system of the invention has superior antiwear properties and also reduced metal, phosphorus and sulphur levels compared to current commercial antiwear agents such as ZDDP.