Patent US2765220A successfully refreshed from Google Patents.
US2765220A
Expired / Lapsed
US
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Lead scavenger compositions
Assignee: Shell Development Co
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Filing: 1952-07-22
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Granted: 1956-10-02
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Expires: 1972-07-22
Abstract
No abstract record available.
Inventors
- 👤 Venard E Yust
- 👤 John L Bame
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:39
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/201; C10L1/202; C10L1/26; C10L1/2633; C10L1/2641; C10L1/265; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A FUEL COMPOSITION FOR INTERNAL COMBUSTION SPARK IGNITION ENGINES CONSISTING ESSENTIALLY OF A STABLE GASOLINE, A MINOR EFFECTIVE ANTI-DETONANT AMOUNT OF A TETRA LOWER ALKYL LEAD ANTI-DETONANT, AND A MIXTURE CONSISTING ESSENTIALLY OF A HALOHYDROCARBON SCAVENGER FOR SAID ANTI-DETONANT AND OF A SPARK PLUG ANTI-FOULING PHOSPHORUS COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
50 words
A FUEL COMPOSITION FOR INTERNAL COMBUSTION SPARK IGNITION ENGINES CONSISTING ESSENTIALLY OF A STABLE GASOLINE, A MINOR EFFECTIVE ANTI-DETONANT AMOUNT OF A TETRA LOWER ALKYL LEAD ANTI-DETONANT, AND A MIXTURE CONSISTING ESSENTIALLY OF A HALOHYDROCARBON SCAVENGER FOR SAID ANTI-DETONANT AND OF A SPARK PLUG ANTI-FOULING PHOSPHORUS COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
CA421568A
Cited
US2155678A
Cited
US2301370A
Cited
US2364921A
Cited
US2405560A
Cited
GB600191A
Cited
US2398281A
Cited
GB683405A
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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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |