US2622971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amino phenols as rich mixture additives
Assignee: California Research LLC
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Filing: 1947-12-17
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Granted: 1952-12-23
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Expires: 1967-12-17
Abstract
No abstract record available.
Inventors
- 👤 Jr George H Denison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:54
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/223; C10L1/2235
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A SPARK IGNITION ENGINE FUEL COMPRISING A SUBSTANTIALLY GUM-FREE HYDROCARBON FUEL BOILING IN THE GASOLINE BOILING RANGE AND HAVING AN F-2 METHOD OCTANE RATING NOT LESS THAN 100 NUMBERS AND CONTAINING 0.001 TO 0.5% BY WEIGHT OF AN ADDITIVE WHICH WILL IMPROVE THE RICH MIXTURE ANTI-KNOCK VALUE OF THE FUEL SELECTED FROM THE GROUP CONSISTING OF N-METHYL AMINO PHENOLS AND NUCLEAR C1 TO C4 ALKYL HOMOLOGS THEREOF.
Claim 2
Dependent Claim
67 words
A SPARK IGNITION ENGINE FUEL COMPRISING A SUBSTANTIALLY GUM-FREE HYDROCARBON FUEL BOILING IN THE GASOLINE BOILING RANGE AND HAVING AN F-2 METHOD OCTANE RATING NOT LESS THAN 100 NUMBERS AND CONTAINING 0.001 TO 0.5% BY WEIGHT OF AN ADDITIVE WHICH WILL IMPROVE THE RICH MIXTURE ANTI-KNOCK VALUE OF THE FUEL SELECTED FROM THE GROUP CONSISTING OF N-METHYL AMINO PHENOLS AND NUCLEAR C1 TO C4 ALKYL HOMOLOGS THEREOF.
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) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |