Patent US2697033A successfully refreshed from Google Patents.
US2697033A
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: 1954-12-14
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Expires: 1970-03-28
Abstract
No abstract record available.
Inventors
- 👤 Henry A Ambrose
- 👤 Oliver L Brandes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:44
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 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, WHEREIN THE STRAIGHT RUN AND CATALYTICALLY CRACKED FUEL OILS ARE PRESENT IN A VOLUME RATIO OF BETWEEN ABOUT 9:1 AND ABOUT 1:9, AND CONTAINING A SMALL AMOUNT OF A COMBINATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ZINC, BARIUM, CALCIUM, AND MAGNESIUM SALTS OF A DIALKYL DITHIOPHOSPHORIC ACID IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE BARIUM AND CALCIUM SALTS OF OIL-SOLUBLE PETROELEUM SULFONIC ACIDS, SAID SMALL AMOUNT BEING SUFFICIENT TO INHIBIT SLUDGE DEPOSITION FROM SAID MIXTURE OF OILS AND COMPRISING AT LEAST 0.005 PER CENT BY WEIGHT OF SAID MIXTURE OF OILS OF EACH OF SAID SALT OF SAID DIALKYL DITHIOPHOSPHORIC ACID AND SAID SALT OF SAID OIL-SOLUBLE PETROLEUM SULFONIC ACIDS AND NOT MORE THAN 0.25 PER CENT OF SAID COMBINATION BY WEIGHT OF SAID MIXTURE OF OILS.
Claim 2
Dependent Claim
169 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, WHEREIN THE STRAIGHT RUN AND CATALYTICALLY CRACKED FUEL OILS ARE PRESENT IN A VOLUME RATIO OF BETWEEN ABOUT 9:1 AND ABOUT 1:9, AND CONTAINING A SMALL AMOUNT OF A COMBINATION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE ZINC, BARIUM, CALCIUM, AND MAGNESIUM SALTS OF A DIALKYL DITHIOPHOSPHORIC ACID IN WHICH THE ALKYL GROUPS CONTAIN 4 TO 12 CARBON ATOMS AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF THE BARIUM AND CALCIUM SALTS OF OIL-SOLUBLE PETROELEUM SULFONIC ACIDS, SAID SMALL AMOUNT BEING SUFFICIENT TO INHIBIT SLUDGE DEPOSITION FROM SAID MIXTURE OF OILS AND COMPRISING AT LEAST 0.005 PER CENT BY WEIGHT OF SAID MIXTURE OF OILS OF EACH OF SAID SALT OF SAID DIALKYL DITHIOPHOSPHORIC ACID AND SAID SALT OF SAID OIL-SOLUBLE PETROLEUM SULFONIC ACIDS AND NOT MORE THAN 0.25 PER CENT 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) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |