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. 18, 2005
Filed:
Feb. 15, 2002
Jeffrey L. Milner, Midlothian, VA (US);
Roger M. Sheets, Glen Allen, VA (US);
David R. Ellis, Hampshire, GB;
Rodney I. Barber, Berkshire, GB;
Jeffrey L. Milner, Midlothian, VA (US);
Roger M. Sheets, Glen Allen, VA (US);
David R. Ellis, Hampshire, GB;
Rodney I. Barber, Berkshire, GB;
Ethyl Corporation, Richmond, VA (US);
Abstract
Gear oils meeting GL-5 specifications are obtained by blending a base oil, a thermally stable phosphorus-containing anti-wear agent; and a metal-free sulfur-containing extreme-pressure agent; wherein the thermally stable phosphorus-containing anti-wear agent is present in an amount sufficient to provide from 100 to 350 ppm phosphorus to the formulated gear oil and wherein the metal-free sulfur-containing extreme-pressure agent is present in an amount sufficient to provide at least 10,000 ppm sulfur to the formulated gear oil and wherein the formulated gear oil contains 350 ppm of phosphorus or less.