Patent US3877889A successfully refreshed from Google Patents.
US3877889A
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Liquid hydrocarbon fuels containing Mannich bases or derivatives thereof
Assignee: Lubrizol Corp
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Filing: 1973-11-07
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Granted: 1975-04-15
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Expires: 1993-11-07
Abstract
Abstract Fuels with improved dispersancy, anti-icing and rust inhibiting properties contain a compound prepared by the Mannich reaction between a hydroxy-substituted aromatic compound, usually an alkylphenol in which the alkyl group contains at least about six carbon atoms; formaldehyde or a reversible polymer thereof; and a hydroxyalkyl-substituted amine such as diethanolamine. Also useful as additives are the epoxide adducts of such compounds.
Inventors
- 👤 Robert Wayne Dix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:55
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/24; C10L1/2493; C10L1/22; C10L1/221
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
39 words
A COMPOSITION COMPRISING A MAJOR AMOUNT OF A LIQUID HYDROCARBON FUEL AND, DISSOLVED OR SUBSTANTIALLY STABLY DISPERSED THEREIN, A MINOR AMOUNT SUFFICIENT TO IMPROVE DISPERSANCY, ANTI-ICING OR RUST INHIBITING PROPERTIES THEREOF OF AT LEAST ONE COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
39 words
A COMPOSITION COMPRISING A MAJOR AMOUNT OF A LIQUID HYDROCARBON FUEL AND, DISSOLVED OR SUBSTANTIALLY STABLY DISPERSED THEREIN, A MINOR AMOUNT SUFFICIENT TO IMPROVE DISPERSANCY, ANTI-ICING OR RUST INHIBITING PROPERTIES THEREOF OF AT LEAST ONE COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
25 words
A composition according to claim 1 wherein R1 is a monohydroxy-substituted monoalkylaromatic radical in which the alkyl group contains at least about 6 carbon atoms.
Claim 4
Dependent Claim
16 words
A composition according to claim 2 wherein each of R2 and R3 is a hydroxyethyl radical.
Claim 5
Dependent Claim
17 words
A composition according to claim 2 wherein the alkyl group in R1 contains about 10-20 carbon atoms.
Claim 6
Dependent Claim
12 words
A composition according to claim 4 wherein x is 1 or 2.
Claim 7
Dependent Claim
16 words
A composition according to claim 5 wherein each of R2 and R3 is a hydroxyethyl radical.
Claim 8
Dependent Claim
16 words
A composition according to claim 6 wherein the alkyl group in R1 is a tetrapropenyl group.
Claim 9
Dependent Claim
49 words
A composition comprising a major amount of a liquid hydrocarbon fuel and, dissolved or substantially stably dispersed therein, a minor amount sufficient to improve dispersancy, anti-icing or rust inhibiting properties thereof of at least one adduct of at least one epoxide with one or more compounds of the formula
Claim 10
Dependent Claim
49 words
A composition comprising a major amount of a liquid hydrocarbon fuel and, dissolved or substantially stably dispersed therein, a minor amount sufficient to improve dispersancy, anti-icing or rust inhibiting properties thereof of at least one adduct of at least one epoxide with one or more compounds of the formula
Claim 11
Dependent Claim
42 words
A composition according to claim 8 wherein the epoxide is a lower alkylene oxide, R1 is a monohydroxy-substituted monoalkylaromatic radical in which the alkyl group contains at least about 6 carbon atoms, and each of R2 and R3 is a hydroxyethyl radical.
Claim 12
Dependent Claim
30 words
A composition according to claim 9 wherein the epoxide is ethylene or propylene oxide, and alkyl group in R1 contains about 10-20 carbon atoms, and x is 1 or 2.
Claim 13
Dependent Claim
22 words
A composition according to claim 10 wherein the epoxide is propylene oxide and the alkyl group in R1 is a tetrapropenyl group.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |