US4822504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant compositions containing oxidized sulfurized isobutylene
Assignee: Mobil Oil AS
•
Filing: 1987-10-15
•
Granted: 1989-04-18
•
Expires: 2007-10-15
Abstract
Abstract Disclosed is a lubricant composition made up to a lubricant and an oxidized sulfurized isobutylene prepared by reacting a mild oxidizing agent with commercially available sulfurized isobutylene. The lubricant composition imparts improved roller bearing life.
Inventors
- 👤 Costandi A. Audeh
- 👤 Andrew Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:11
CPC Classifications
C; C10; C10M; C10M135/00; C10M135/02; C10M135/04; C07; C07G; C07G99/00; C07G99/002; C07G99/0022; C10M2219/00; C10M2219/02; C10M2219/022
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
79 words
A lubricant composition comprising an oil of lubricating viscosity or grease and between about 0.5 and about 7.5 percent by weight of an oxidized sulfurized butylene product prepared by reacting liquid sulfurized isobutylene with a mild oxidizing agent in a mole ratio of oxidizing agent to sulfurized olefin of between about 0.5 and about 2.5 at a temperature between about 20° C. and about 95° C. and recovering a liquid oxidized sulfurized isobutylene product soluble in said lubricating composition.
Claim 2
Dependent Claim
79 words
A lubricant composition comprising an oil of lubricating viscosity or grease and between about 0.5 and about 7.5 percent by weight of an oxidized sulfurized butylene product prepared by reacting liquid sulfurized isobutylene with a mild oxidizing agent in a mole ratio of oxidizing agent to sulfurized olefin of between about 0.5 and about 2.5 at a temperature between about 20° C. and about 95° C. and recovering a liquid oxidized sulfurized isobutylene product soluble in said lubricating composition.
Claim 3
Dependent Claim
24 words
The lubricant composition of claim 1 wherein the lubricant is selected from the group consisting of mineral oils, synthetic oils, mixtures thereof, and greases.
Claim 4
Dependent Claim
17 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of hydrogen peroxide.
Claim 5
Dependent Claim
19 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of potassium or sodium permanganate.
Claim 6
Dependent Claim
19 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of potassium or sodium dichromate.
Claim 7
Dependent Claim
19 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of potassium or sodium iodate.
Claim 8
Dependent Claim
20 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of a potassium or sodium perborate.
Claim 9
Dependent Claim
30 words
The lubricant composition of claim 1 wherein the oxidizing agent is an aqueous solution of a per acid selected from the group consisting of perchloric, permanganic, permonosulfuric and persulfuric acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |