Premium synthetic lubricants
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 5, 2002
Grant Date -
N/A
app pub date -
Sep 4, 1998
filing date -
Sep 4, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Premium synthetic lubricants comprise a synthetic isoparaffinic hydrocarbon base stock and an effective amount of at least one, and typically a plurality of lubricant additives such as a detergent, dispersant, antioxidant, antiwear additive, pout point depresant, VI improver and the like. The base stock is derived from a waxy, paraffinic, Fischer-Tropsch synthesized hydrocarbon feed fraction having an initial boiling point in the range of about 650-750.degree. F. and continuously boiling up to at least 1050.degree. F., by a process which comprises hydroisomerizing the feed and dewaxing the isomerate. The waxy feed has a T.sub.90 -T.sub.10 temperature difference of at least 350.degree. F. and is preferably hydroisomerized without any pretreatment, other than optional fractionation. The lubricant may also contain hydrocarbonaceous and synthetic base stock material. Lubricants, such as fully formulated multigrade automotive crankcase and transmission oils formed by adding a suitable additive package to the isoparaffinic base stock have exhibited performance superior to similar fully formulated oils based on both PAO and conventional, petroleum derived base stocks.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully