US3779724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen-containing carbohydrate derivatives and hydrocarbon fuel compositions containing same
Assignee: Citgo Petroleum Corp
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Filing: 1970-04-29
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Granted: 1973-12-18
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Expires: 1990-04-29
Abstract
Abstract Compounds useful as additives in hydrocarbon fuels are prepared by reacting the lactone of a carbohydrate acid with a Nhydrocarbylhydrocarbylenediamine in which the amino groups are separated by two or three methylene groups. The reaction products are the isomeric amides of the carbohydrate acid and the hydrocarbylenediamine and also the heterocyclic compounds obtained when the foregoing amides cyclize with elimination of a mole of water. Hydrocarbon fuel compositions containing these additives exhibit enhanced carburetor detergency and rust inhibiting properties.
Inventors
- 👤 P Kerschner
- 👤 E Badin
- 👤 A Cresti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:41
CPC Classifications
C; C07; C07D; C07D239/00; C07D239/02; C07D239/06; C07D233/00; C07D233/04; C07D233/20; C07D233/22; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/224; C10L1/232; C10L1/234; C10L1/238; C10L1/2383
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
The composition of claim 1 wherein the normally liquid hydrocarbon fuel is selected from the group consisting of gasoline, diesel fuel and jet fuel.
Claim 2
Dependent Claim
18 words
The composition of claim 2 wherein R is a hydrocarbyl group of about 12 to about 30 carbons.
Claim 3
Dependent Claim
24 words
The composition of claim 3 wherein the concentration of the additive is about 3 to about 10 pounds per thousand barrels of said composition.
Claim 4
Dependent Claim
12 words
The composition of claim 4 wherein the additive is a mixture of
Claim 5
Dependent Claim
14 words
The composition of claim 4 wherein the additive is a compound having the formula
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) | 1976-12-17 | 1977-06-18 | 1977-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-17 | 1981-06-18 | 1981-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-17 | 1985-06-18 | 1985-12-18 | $7700.00 | Window Closed / Lapsed |