US5407453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deposit cleaning composition for internal combustion engines
Assignee: Lubrizol Corp
•
Filing: 1993-03-19
•
Granted: 1995-04-18
•
Expires: 2013-03-19
Abstract
Abstract It has been found that a composition comprising an alkoxy alcohol, an aliphatic alcohol, a liquid petroleum distillate, a liquid fatty acid, a volatile nitrogen base, polyisobutenyl aminoethylethanolamine, and water may be used as an engine deposit cleaner which removes air and fuel induction system deposits, valve deposits, and combustion chamber deposits. The inventive composition may be introduced into the engine in lieu of fuel, or in conjunction with fuel while the engine is operating.
Inventors
- 👤 G. Frederick Pierce-Ruhland
- 👤 Stephen H. Stoldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:40
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/20; C11D3/2075; C11D3/2079; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3773; C11D3/43; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C11D7/22; C11D7/26; C11D7/261; C11D7/263; C11D7/32; C11D7/3209; C11D7/3218; C11D7/3227; C11D7/50; F; F02; F02B; F02B77/00; F02B77/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
An engine deposit cleaning composition for removing deposits from internal combustion engines when introduced through the injectors of said engines while operating, said composition comprising the following ingredients: ______________________________________
Percent by Weight
______________________________________
Alkoxy alcohol containing 2-5
1-6
carbon atoms in the alkoxy group and
2-3 carbon atoms in
the alcohol group
Aliphatic alcohol having 4-6 carbon atoms
1-6
Liquid Petroleum distillate
47-98
Liquid fatty acid of 12-20 carbon atoms
1-6
Polyisobutenyl aminoethylethanolamine
.02-5
Water 5-30
Volatile nitrogen base selected from the
group consisting of ammonia, and an organic
amine in sufficient quantity to approximately
neutralize the liquid fatty acid.
______________________________________
Claim 2
Dependent Claim
101 words
An engine deposit cleaning composition for removing deposits from internal combustion engines when introduced through the injectors of said engines while operating, said composition comprising the following ingredients: ______________________________________
Percent by Weight
______________________________________
Alkoxy alcohol containing 2-5
1-6
carbon atoms in the alkoxy group and
2-3 carbon atoms in
the alcohol group
Aliphatic alcohol having 4-6 carbon atoms
1-6
Liquid Petroleum distillate
47-98
Liquid fatty acid of 12-20 carbon atoms
1-6
Polyisobutenyl aminoethylethanolamine
.02-5
Water 5-30
Volatile nitrogen base selected from the
group consisting of ammonia, and an organic
amine in sufficient quantity to approximately
neutralize the liquid fatty acid.
______________________________________
Claim 3
Dependent Claim
24 words
An engine cleaning composition according to claim 1 containing in addition between 0.3 and 1.5% of an alkali or alkaline earth metal petroleum sulfonate.
Claim 4
Dependent Claim
28 words
An engine cleaning composition according to claim 1 wherein the liquid petroleum distillate contains a lubricating oil of a viscosity between 60 and 800 SUS at 100° F.
Claim 5
Dependent Claim
16 words
An engine cleaning composition according to claim 1 wherein the volatile nitrogen base is aqueous ammonia.
Claim 6
Dependent Claim
15 words
An engine cleaning composition according to claim 1 wherein the volatile nitrogen base is trimethylamine.
Claim 7
Dependent Claim
16 words
An engine cleaning composition according to claim 1 wherein the liquid fatty acid is oleic acid.
Claim 8
Dependent Claim
17 words
An engine cleaning composition according to claim 1 wherein the liquid petroleum distillate contains an aromatic naphtha.
Claim 9
Dependent Claim
15 words
An engine cleaning composition according to claim 1 wherein the alkoxy alcohol is butyl cellosolve.
Claim 10
Dependent Claim
16 words
An engine cleaning composition according to claim 1 wherein the aliphatic alcohol is methyl isobutyl carbinol.
Claim 11
Dependent Claim
101 words
An engine deposit cleaning composition for removing deposits from internal combustion engines when introduced through the injectors of said engines while operating, said composition comprising the following ingredients: ______________________________________
Percent by Weight
______________________________________
Alkoxy alcohol containing 2-5
2-12
carbon atoms in the alkoxy group and 2-3
carbon atoms in the alcohol group
Aliphatic alcohol having 4-6 carbon atoms
2-12
Liquid Petroleum distillate
10-30
Liquid fatty acid of 12-20 carbon atoms
2-12
Polyisobutenyl aminoethylethanolamine
.04-10
Water 10-60
Volatile nitrogen base selected from the
group consisting of ammonia, and an organic
amine in sufficient quantity to approximately
neutralize the liquid fatty acid.
______________________________________
Claim 12
Dependent Claim
101 words
An engine deposit cleaning composition for removing deposits from internal combustion engines when introduced through the injectors of said engines while operating, said composition comprising the following ingredients: ______________________________________
Percent by Weight
______________________________________
Alkoxy alcohol containing 2-5
2-12
carbon atoms in the alkoxy group and 2-3
carbon atoms in the alcohol group
Aliphatic alcohol having 4-6 carbon atoms
2-12
Liquid Petroleum distillate
10-30
Liquid fatty acid of 12-20 carbon atoms
2-12
Polyisobutenyl aminoethylethanolamine
.04-10
Water 10-60
Volatile nitrogen base selected from the
group consisting of ammonia, and an organic
amine in sufficient quantity to approximately
neutralize the liquid fatty acid.
______________________________________
Claim 13
Dependent Claim
68 words
An engine deposit cleaning composition according to claim 1 of the following composition: ______________________________________
Weight Percent
______________________________________
Butyl Cellosolve 2-4
Methyl Isobutyl Carbinol 2-4
Liquid Petroleum Distillate
68-79
Aqueous Ammonia (28%) 0.5-1.5
Water 11-13
Oleic Acid 2-4
Calcium Petroleum Sulfonate
0.1-0.5
Polyisobutenyl aminoethylethanolamine
1-3
wherein the liquid petroleum distillate comprises
Gasoline 45-50
500 SUS Neutral Oil 1-2
700 SUS Neutral oil 4-5
Xylene 10-12
Mineral Spirits 8-10
______________________________________
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |