Patent US3188187A successfully refreshed from Google Patents.
US3188187A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gasoline compositions
Assignee: Shell USA Inc
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Filing: 1962-06-04
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Granted: 1965-06-08
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Expires: 1982-06-04
Abstract
No abstract record available.
Inventors
- 👤 Hubert T Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:08
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
28 words
A FUEL COMPOSITION FOR INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF GASOLINE, A MINOR SUFFICIENTLY EFFECTIVE ANTIKNOCK AMOUNT OF A TETRAALKYLLEAD ANTIKNOCK COMPOUND, A TRIHYDROCARBON PHOSPHATE HAVING THE FORMULA
Claim 2
Dependent Claim
28 words
A FUEL COMPOSITION FOR INTERNAL COMBUSTION ENGINES CONSISTING ESSENTIALLY OF GASOLINE, A MINOR SUFFICIENTLY EFFECTIVE ANTIKNOCK AMOUNT OF A TETRAALKYLLEAD ANTIKNOCK COMPOUND, A TRIHYDROCARBON PHOSPHATE HAVING THE FORMULA
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) | 1968-06-07 | 1968-12-07 | 1969-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-07 | 1972-12-07 | 1973-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-07 | 1976-12-07 | 1977-06-08 | $7700.00 | Window Closed / Lapsed |