US3640692A
Expired / Lapsed
US
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Stabilized distillate hydrocarbon fuel oil compositions and additives therefor
Assignee: Citgo Petroleum Corp
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Filing: 1969-10-29
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Granted: 1972-02-08
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Expires: 1989-10-29
Abstract
Abstract A stabilized distillate hydrocarbon fuel oil composition comprising a major proportion of a distillate hydrocarbon fuel and a minor proportion of a stabilizer comprising (a) an additive selected from the group consisting of (1) an amide plus a Schiff base; (2) an amide containing a Schiff base group; and (3) an amide containing a Schiff base group in combination with either an amide or a Schiff base; and (b) a cyclohexylamine. The additives of the invention are useful in stabilizing distillate hydrocarbon fuels such as No. 2 fuel oils, diesel fuels, and jet fuels.
Inventors
- 👤 Marvin S Rakow
- 👤 Robert J Konig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:22
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/224; C10L1/228; C10L1/2283; C10L1/232; C10L1/234; C10L1/238; C10L1/2381
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
a cyclohexylamine selected from the group consisting of N,N-dimethylcyclohexylamine and dicyclohexylamine, wherein each component of the stabilizer is present in the hydrocarbon fuel oil composition in the amount of about 0.5 to about 20.0 pounds pEr thousand barrels of said hydrocarbon fuel oil composition.
Claim 2
Dependent Claim
27 words
The composition of claim 1 wherein the distillate hydrocarbon fuel oil is selected from the group consisting of No. 2 fuel oil, diesel fuel, and jet fuel.
Claim 3
Dependent Claim
8 words
an amide containing a Schiff base group; and
Claim 4
Dependent Claim
48 words
an amide containing a Schiff base group in combination with either an amide or a Schiff base wherein the amide of (1) and (3) is selected from the group consisting of polyamides derived from the condensation of polymerized fatty acids with polyalkyl polyamines and amides having the structures
Claim 5
Dependent Claim
38 words
The composition of claim 1 wherein each component of the stabilizer is present in the hydrocarbon fuel oil composition in the amount of about 1.0 to about 10.0 pounds per thousand barrels of said hydrocarbon fuel oil composition.
Claim 6
Dependent Claim
27 words
The composition of claim 3 wherein the distillate hydrocarbon fuel oil is selected from the group consisting of No. 2 fuel oil, diesel fuel, and jet fuel.
Claim 7
Dependent Claim
18 words
A stabilizer composition for distillate hydrocarbon fuel oils comprising: a. an additive selected from the group consisting of:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |