Patent US2641539A successfully refreshed from Google Patents.
US2641539A
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Preventing discoloration of fuel oil
Assignee: Universal Oil Products Co
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Filing: 1950-04-12
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Granted: 1953-06-09
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Expires: 1970-04-12
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
- 👤 Joseph A Chenicek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:27
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/2225; C10L1/228; C10L1/2283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A FUEL OIL HEAVIER THAN GASOLINE CONTAINING FROM ABOUT 0.0005% TO ABOUT 1.0% BY WEIGHT OF AN ADDITIVE MIXTURE COMPRISING (1) FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF A BENZALAMINOALKANOL IN WHICH THE ALKANOL GROUP CONTAINS FROM ABOUT 2 TO ABOUT 12 CARBON ATOMS PER MOLECULE, (2) FROM ABOUT 10 TO ABOUT 70% BY WEIGHT OF AN ALKANOL AMINE CONTAINING FROM ABOUT 8 TO ABOUT 40 CARBON ATOMS PER MOLECULE, (3) FROM ABOUT 10 TO ABOUT 70% BY WEIGHT OF AN ALKYL AMINE CONTAINING FROM ABOUT 6 TO ABOUT 20 CARBON ATOMS PER MOLECULE AND (4) FROM ABOUT 1 TO ABOUT 20% BY WEIGHT OF A METAL DEACTIVATOR COMPRISING A COMPOUND CAPABLE OF FORMING CHELATE COMPOUNDS WITH METALS.
Claim 2
Dependent Claim
120 words
A FUEL OIL HEAVIER THAN GASOLINE CONTAINING FROM ABOUT 0.0005% TO ABOUT 1.0% BY WEIGHT OF AN ADDITIVE MIXTURE COMPRISING (1) FROM ABOUT 10% TO ABOUT 50% BY WEIGHT OF A BENZALAMINOALKANOL IN WHICH THE ALKANOL GROUP CONTAINS FROM ABOUT 2 TO ABOUT 12 CARBON ATOMS PER MOLECULE, (2) FROM ABOUT 10 TO ABOUT 70% BY WEIGHT OF AN ALKANOL AMINE CONTAINING FROM ABOUT 8 TO ABOUT 40 CARBON ATOMS PER MOLECULE, (3) FROM ABOUT 10 TO ABOUT 70% BY WEIGHT OF AN ALKYL AMINE CONTAINING FROM ABOUT 6 TO ABOUT 20 CARBON ATOMS PER MOLECULE AND (4) FROM ABOUT 1 TO ABOUT 20% BY WEIGHT OF A METAL DEACTIVATOR COMPRISING A COMPOUND CAPABLE OF FORMING CHELATE COMPOUNDS WITH METALS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-08 | 1956-12-08 | 1957-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-08 | 1960-12-08 | 1961-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-08 | 1964-12-08 | 1965-06-09 | $7700.00 | Window Closed / Lapsed |