Patent US3254972A successfully refreshed from Google Patents.
US3254972A
Expired / Lapsed
US
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Alkyl lead antiknock appreciators
Assignee: EIDP Inc
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Filing: 1962-04-03
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Granted: 1966-06-07
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Expires: 1982-04-03
Abstract
No abstract record available.
Inventors
- 👤 Edmund L Niedzielski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:46
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/007; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/20; C10L1/205; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
MOTOR FUEL COMPOSITIONS COMPRISING A MIXTURE OF HYDROCARBONS IN THE GASOLINE BOILING RANGE HAVING AT LEAST 15% BY VOLUME AROMATIC HYDROCARBONS, WHICH MIXTURE OF HYDROCARBONS HAS AN OCTANE RATING OF AT LEAST 80, AN ANTIKNOCK QUANTITY OF TETRAALKYL LEAD COMPOUND AND FROM 0.2 TO 1.5 THEORIES OF CHLORINE AS A CHLOROSUBSTITUTED HYDROCARBYLIDENE DIALKANOATE OF THE FORMULA
Claim 2
Dependent Claim
56 words
MOTOR FUEL COMPOSITIONS COMPRISING A MIXTURE OF HYDROCARBONS IN THE GASOLINE BOILING RANGE HAVING AT LEAST 15% BY VOLUME AROMATIC HYDROCARBONS, WHICH MIXTURE OF HYDROCARBONS HAS AN OCTANE RATING OF AT LEAST 80, AN ANTIKNOCK QUANTITY OF TETRAALKYL LEAD COMPOUND AND FROM 0.2 TO 1.5 THEORIES OF CHLORINE AS A CHLOROSUBSTITUTED HYDROCARBYLIDENE DIALKANOATE OF THE FORMULA
References Cited (Backward Citations)
US2210942A
Cited
US2573579A
Cited
US2653862A
Cited
US2568501A
Cited
US2866813A
Cited
US2889359A
Cited
BE571921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |