Patent US4033619A successfully refreshed from Google Patents.
Patent US2833635A successfully refreshed from Google Patents.
US2833635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasoline fuel
Assignee: Ethyl Corp
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Filing: 1954-04-29
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Granted: 1958-05-06
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Expires: 1974-04-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L1/1283; C10L1/14; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
72 words
A FUEL OF ADAPTED FOR USE IN SPARK IGNITION INTERNAL COMBUSTION ENGINES WHICH CONSISTS ESSENTIALLY OF HYDROCARBON FUEL OF THE GASOLINE BOILING RANGE CONTAINING UP TO 6.3 GRAMS OF LEAD PER GALLON AS A LEAD ALKYL ANTIKNOCK AGENT AND A PHOSPHONITRILIC HALIDE HAVING FROM 3 TO 4 ATOMS OF PHOSPHORUS PER MOLECULE, SAID PHOSPHONITRILIC HALIDE BEING PRESENT IN AMOUNT SUCH THAT THE PHOSPHORUSTO-LEAD ATOM RATIO IS FROM ABOUT 0.0067 TO ABOUT 0.67.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |