Patent US2506539A successfully refreshed from Google Patents.
US2506539A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel for internal-combustion spark ignition engines
Assignee: Carboline Ltd
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Filing: 1944-07-07
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Granted: 1950-05-02
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Expires: 1964-07-07
Abstract
No abstract record available.
Inventors
- 👤 Boardman Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:37
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/23; C10L1/231
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
AN IMPROVED LIQUID FUEL FOR INTERNAL COMBUSTION SPARK IGNITION ENGINES COMPRISING FROM 0.001% TO 0.03% BY WEIGHT OF A MIXTURE OF AN AROMATIC METAL-FREE NITRO COMPOUND AND AN IRON SALT OF AN AROMATIC NITRO ACID, THE RATIO BY WEIGHT OF IRON SALT TO AROMATIC METAL-FREE NITRO COMPOUND IN SAID MIXTURE BEING WITHIN THE RANGE OF FROM 1/10 TO 1/100.
Claim 2
Dependent Claim
59 words
AN IMPROVED LIQUID FUEL FOR INTERNAL COMBUSTION SPARK IGNITION ENGINES COMPRISING FROM 0.001% TO 0.03% BY WEIGHT OF A MIXTURE OF AN AROMATIC METAL-FREE NITRO COMPOUND AND AN IRON SALT OF AN AROMATIC NITRO ACID, THE RATIO BY WEIGHT OF IRON SALT TO AROMATIC METAL-FREE NITRO COMPOUND IN SAID MIXTURE BEING WITHIN THE RANGE OF FROM 1/10 TO 1/100.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-01 | 1953-10-31 | 1954-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-01 | 1957-10-31 | 1958-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-01 | 1961-10-31 | 1962-05-02 | $7700.00 | Window Closed / Lapsed |