Patent US2722477A successfully refreshed from Google Patents.
US2722477A
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Stabilized fuel antiknock
Assignee: Ethyl Corp
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Filing: 1951-10-20
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Granted: 1955-11-01
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Expires: 1971-10-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/103; C10L1/14; C10L1/22; C10L1/222; C10L1/223; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
INCOMBINATION TETRAETHYLLEAD AND A STABILIZING AMOUNT OF A COMPOSITION CONSISTING ESSENTIALLY OF 2-AMINODIPHENYLAMINE IN ADMIXTURE WITH AN ALIPHATIC KETONE, SAID 2-AMINODIPHENYLAMINE PRESENT IN AMOUNT BETWEEN ABOUT 10 AND ABOUT 50 WEIGHT PER CENT OF SUCH STABILIZING COMPOSITION.
References Cited (Backward Citations)
US1835140A
Cited
US2410829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-31 | 1959-05-02 | 1959-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-31 | 1963-05-02 | 1963-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-31 | 1967-05-02 | 1967-11-01 | $7700.00 | Window Closed / Lapsed |