US2860958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiknock compositions
Assignee: Ethyl Corp
•
Filing: 1956-08-10
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Granted: 1958-11-18
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis F Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:58
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/201; C10L1/202; C10L1/203; C10L1/205; C10L1/26; C10L1/2633; C10L1/2641; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
107 words
GASOLINE CONTAINING FROM ABOUT 0.53 TO ABOUT 6.34 GRAMS OF LEAD PER GALLON AS AN ALKYLLEAD ANTIKNOCK AGENT, 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 TRIALKYLPHOSPHATE IN WHICH EACH ALKYL GROUP CONTAINS FROM 5 TO 8 CARBON ATOMS AND IS BRANCHED ON A CARBON ATOM OTHER THAN THE ALPHA CARBON ATOM, EACH BRANCH BEING FROM 1 TO 2 CARBON ATOMS IN LENGTH, SAID PHOSPHATE BEING PRESENT IN THE GASOLINE IN AMOUNT SUCH THAT THE PHOSPHORUS-TO-LEAD ATOM RATIO IS FROM ABOUT 0.1:3 TO 1.6:3.
References Cited (Backward Citations)
US2340331A
Cited
US2405560A
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US2375218A
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GB600191A
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US2427173A
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US2543514A
Cited
GB683405A
Cited
US2765220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |