US2678262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stable fuel oil compositions
Assignee: Gulf Research and Development Co
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Filing: 1950-03-28
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Granted: 1954-05-11
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Expires: 1970-03-28
Abstract
No abstract record available.
Inventors
- 👤 Richard J Neely
- 👤 Township Harmar
- 👤 Robert P Gilmartin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:30
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/26; C10L1/2633; C10L1/2641; C10L1/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A FUEL OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A MIXTURE OF STRAIGHT RUN AND CATALYTICALLY CRACKED DISTILLATE FUEL OILS TENDING TO DEPOSIT SLUDGE AND CONTAINING A SMALL AMOUNT OF A COMBINATION OF A SALT OF A METAL OF GROUP II AND A DIALKYL DITHIOPOSPHORIC ACID IN WHICH THE THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS, AND OF A TRIALKYLPHOSPHITE IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS, SAID SMALL AMOUNT BEING SUFFICIENT TO INHIBIT SLUDGE DEPOSITION FROM SAID MIXTURE OF OILS AND COMPRISING AT LEAST 0.005% BY WEIGHT OF SAID MIXTURE OF OILS OF EACH OF SAID SALT OF SAID DIALKYL DITHIOPHOSPHORIC ACID AND OF SAID TRIALKYLPHOSPHITE AND NOT MORE THAN 0.25% OF SAID COMBINATION BY WEIGHT OF SAID MIXTURE OF OILS.
Claim 2
Dependent Claim
128 words
A FUEL OIL COMPOSITION COMPRISING A MAJOR PROPORTION OF A MIXTURE OF STRAIGHT RUN AND CATALYTICALLY CRACKED DISTILLATE FUEL OILS TENDING TO DEPOSIT SLUDGE AND CONTAINING A SMALL AMOUNT OF A COMBINATION OF A SALT OF A METAL OF GROUP II AND A DIALKYL DITHIOPOSPHORIC ACID IN WHICH THE THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS, AND OF A TRIALKYLPHOSPHITE IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS, SAID SMALL AMOUNT BEING SUFFICIENT TO INHIBIT SLUDGE DEPOSITION FROM SAID MIXTURE OF OILS AND COMPRISING AT LEAST 0.005% BY WEIGHT OF SAID MIXTURE OF OILS OF EACH OF SAID SALT OF SAID DIALKYL DITHIOPHOSPHORIC ACID AND OF SAID TRIALKYLPHOSPHITE AND NOT MORE THAN 0.25% OF SAID COMBINATION BY WEIGHT OF SAID MIXTURE OF OILS.
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) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |