Patent US2684894A successfully refreshed from Google Patents.
US2684894A
Expired / Lapsed
US
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Alkali metal chromates as sludge inhibitors for blended fuel oil
Assignee: Standard Oil Development Co
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Filing: 1951-12-12
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Granted: 1954-07-27
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Expires: 1971-12-12
Abstract
No abstract record available.
Inventors
- 👤 James J Trexel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:43
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/12; C10L1/1233
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A HYDROCARBON FUEL OIL COMPOSITION COMPRISING UP TO ABOUT 80% A NON-CATALYTICALLY CRACKED FUEL OIL, AT LEAST 20% OF A CATALYTICALLY CRACKED FUEL OIL AND HAVING ADDED THERETO AS A SLUDGE INHIBITOR ABOUT 0.005 TO 0.5% BY WEIGHT OF AN ALKALI METAL CHROMATE IN ABOUT 10% AQUEOUS SOLUTION.
Claim 2
Dependent Claim
48 words
A HYDROCARBON FUEL OIL COMPOSITION COMPRISING UP TO ABOUT 80% A NON-CATALYTICALLY CRACKED FUEL OIL, AT LEAST 20% OF A CATALYTICALLY CRACKED FUEL OIL AND HAVING ADDED THERETO AS A SLUDGE INHIBITOR ABOUT 0.005 TO 0.5% BY WEIGHT OF AN ALKALI METAL CHROMATE IN ABOUT 10% AQUEOUS SOLUTION.
References Cited (Backward Citations)
US2241638A
Cited
US2455659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |