US3004838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiknock compositions
Assignee: Ethyl Corp
•
Filing: 1956-10-24
•
Granted: 1961-10-17
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Expires: 1976-10-24
Abstract
No abstract record available.
Inventors
- 👤 Melvin L Larson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:38
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/22; C10L1/23; C10L1/26; C10L1/2633; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
GASOLINE CONTAINING FROM ABOUT 0.02 TO ABOUT 6.5 GRAMS OF LEAD PER GALLON AS AN ALKYLLEAD ANTIKNOCK COMPOUND, A SCAVENGING AMOUNT OF AN ORGANIC HALIDE SCAVENGER CAPABLE OF REACTING WITH THE LEAD DURING COMBUSTION IN A SPARK IGNITION INTERNAL COMBUSTION ENGINE TO FORM RELATIVELY VOLATILE LEAD HALIDE, AND A DIALKYL PHOSPHORAMIDATE ESTER IN WHICH EACH ALKYL GROUP CONTAINS FROM 2 TO 10 CARBON ATOMS, SAID PHOSPHORAMIDATE ESTER BEING PRESENT IN AMOUNT SUCH THAT THE PHOSPHORUS-TO-LEAD ATOM RATIO IS FROM ABOUT 0.1:3 TO ABOUT 1.6:3.
Claim 2
Dependent Claim
84 words
GASOLINE CONTAINING FROM ABOUT 0.02 TO ABOUT 6.5 GRAMS OF LEAD PER GALLON AS AN ALKYLLEAD ANTIKNOCK COMPOUND, A SCAVENGING AMOUNT OF AN ORGANIC HALIDE SCAVENGER CAPABLE OF REACTING WITH THE LEAD DURING COMBUSTION IN A SPARK IGNITION INTERNAL COMBUSTION ENGINE TO FORM RELATIVELY VOLATILE LEAD HALIDE, AND A DIALKYL PHOSPHORAMIDATE ESTER IN WHICH EACH ALKYL GROUP CONTAINS FROM 2 TO 10 CARBON ATOMS, SAID PHOSPHORAMIDATE ESTER BEING PRESENT IN AMOUNT SUCH THAT THE PHOSPHORUS-TO-LEAD ATOM RATIO IS FROM ABOUT 0.1:3 TO ABOUT 1.6:3.
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) | 1964-10-16 | 1965-04-17 | 1965-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-16 | 1969-04-17 | 1969-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-16 | 1973-04-17 | 1973-10-17 | $7700.00 | Window Closed / Lapsed |