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:
Feb. 07, 1995
Filed:
Jul. 19, 1993
Rolfe J Hartley, St. Louis, MO (US);
Douglas R Chrisope, St. Louis, MO (US);
Ethyl Petroleum Additives, Inc., Richmond, VA (US);
Abstract
A lubricant composition especially adapted for use as an automatic transmission fluid, which composition consists essentially of: a) from 50 to 85 weight percent of a mineral oil having a viscosity at 100.degree. C. in the range of 3 to 5 centistokes; b) from 5 to 35 weight percent of a poly-.alpha.-olefin lubricating oil having a viscosity at 100.degree. C. in the range of 1 to 8 centistokes; and c) from 8 to 15 weight percent of a combination of alkenyl succinimide dispersant, viscosity index improver and antioxidant; said composition being further characterized in that it contains less than 7.0 weight percent of viscosity index improver and in that the composition has a Brookfield viscosity at -40.degree. C. of no more than 20,000 cP.