US2863743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor fuel
Assignee: Gulf Research and Development Co
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Filing: 1953-11-27
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Granted: 1958-12-09
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Expires: 1973-11-27
Abstract
No abstract record available.
Inventors
- 👤 Jr John P Pellegrini
- 👤 Helen I Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C07; C07F; C07F9/00; C07F9/02; C07F9/06; C07F9/22; C07F9/224
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A MOTOR FUEL HAVING IMPROVED PREIGNITION QUALITIES COMPRISING A MAJOR AMOUNT OF GASOLINE CONTAINING ABOUT 1 TO ABOUT 3 CUBIC CENTIMETERS OF TETRAETHYL LEAD PER GALLON OF GASOLINE, A LEAD SCAVENGING AMOUNT OF A HALO-HYDROCARBON AND BETWEEN ABOUT 0.1 AND 1.5 TIMES THE THEORETICAL AMOUNT OF AN ALKYL-PHOSPHORAMIDE REQUIRED TO CONVERT THE LEAD TO LEAD PHOSPHATE, WHEREIN THE ALKYL GROUP IN SAID ALKYL-PHOSPHORAMIDE CONTAINS FROM 1 TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
70 words
A MOTOR FUEL HAVING IMPROVED PREIGNITION QUALITIES COMPRISING A MAJOR AMOUNT OF GASOLINE CONTAINING ABOUT 1 TO ABOUT 3 CUBIC CENTIMETERS OF TETRAETHYL LEAD PER GALLON OF GASOLINE, A LEAD SCAVENGING AMOUNT OF A HALO-HYDROCARBON AND BETWEEN ABOUT 0.1 AND 1.5 TIMES THE THEORETICAL AMOUNT OF AN ALKYL-PHOSPHORAMIDE REQUIRED TO CONVERT THE LEAD TO LEAD PHOSPHATE, WHEREIN THE ALKYL GROUP IN SAID ALKYL-PHOSPHORAMIDE CONTAINS FROM 1 TO 4 CARBON ATOMS.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |