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:
Aug. 10, 2010
Filed:
May. 14, 2003
W. Preston Barnes, Concord, OH (US);
Virginia A. Carrick, Chardon, OH (US);
Sara B. Pocinki, Cleveland, OH (US);
Jayram D. Patel, Eastlake, OH (US);
W. Preston Barnes, Concord, OH (US);
Virginia A. Carrick, Chardon, OH (US);
Sara B. Pocinki, Cleveland, OH (US);
Jayram D. Patel, Eastlake, OH (US);
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A low-ash, low-phosphorus lubricant composition suitable for use in a stationary gas engine includes an oil of lubricating viscosity, 1.5 to 8 percent of a succinimide dispersant, 0.8 to 4.0 percent of a hindered, ester-substituted phenol antioxidant, and at least one metal-containing sulfonate detergent or metal-containing phenate detergent, in an amount which provides 1.1 to 2.1 percent by weight of said sulfonate or phenate moieties exclusive of the weight of the metal moieties. The lubricant contains up to 0.08 percent by weight phosphorus and up to 1.25 percent sulfated ash.