US2891850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasoline compositions
Assignee: Shell Development Co
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Filing: 1955-08-08
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Granted: 1959-06-23
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Expires: 1975-08-08
Abstract
No abstract record available.
Inventors
- 👤 Stanley L Cosgrove
- 👤 James M Duffin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A GASOLINE FUEL COMPOSITION FOR CARBURATED INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF GASOLINE HAVING AN A.S.T.M. DISTILLATION 50% EVAPORATED TEMPERATURE NOT EXCEDDING 260*F. AND CONTAINING FROM ABOUT 10 TO ABOUT 100 PARTS PER MILLION BY WEIGHT OF AN N-ALKYL SUBSITUTED ALKYLENE DIAMINE CONTAINING AT LEAST TWO HYDROGEN ATOMS ATTACHED DIRECTLY TO NITROGEN, AND HAVING THE TWO DIAMINE NITROGEN ATOMS SEPARATED BY A CHAIN OF FROM 2 THROPUGH 4 CARBON ATOMS, AT LEAST ONE N-SUBSITUTED ALKYL GROUP OF EHICH CONTAINS FROM 10 THROUGH 30 NCARBON ATOMS AND THE ALKYLENE GROUP OF WHICH CONTAINS FROM 2 THROUGH 6 CARBON ATOMS.
Claim 2
Dependent Claim
98 words
A GASOLINE FUEL COMPOSITION FOR CARBURATED INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF GASOLINE HAVING AN A.S.T.M. DISTILLATION 50% EVAPORATED TEMPERATURE NOT EXCEDDING 260*F. AND CONTAINING FROM ABOUT 10 TO ABOUT 100 PARTS PER MILLION BY WEIGHT OF AN N-ALKYL SUBSITUTED ALKYLENE DIAMINE CONTAINING AT LEAST TWO HYDROGEN ATOMS ATTACHED DIRECTLY TO NITROGEN, AND HAVING THE TWO DIAMINE NITROGEN ATOMS SEPARATED BY A CHAIN OF FROM 2 THROPUGH 4 CARBON ATOMS, AT LEAST ONE N-SUBSITUTED ALKYL GROUP OF EHICH CONTAINS FROM 10 THROUGH 30 NCARBON ATOMS AND THE ALKYLENE GROUP OF WHICH CONTAINS FROM 2 THROUGH 6 CARBON ATOMS.
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) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |