US2639227A
Expired / Lapsed
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Anticlogging fuel oil compositions
Assignee: Shell Development Co
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Filing: 1950-09-02
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Granted: 1953-05-19
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Expires: 1970-09-02
Abstract
No abstract record available.
Inventors
- 👤 Everett B Glendenning
- 👤 Wies Calmy
- 👤 John B R Caron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:14
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/182; C10L1/1828; C10L1/192; C10L1/198; C10L1/1981; C10L1/24; C10L1/2431; C10L1/2437
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A NON-CLOGGING FUEL OIL NORMALLY SUSCEPTIBLE TO CAUSE CLOGGING DUE TO THE PRESENCE OF CRACKED COMPONENTS IN THE FUEL OIL, CONTAINING IN COMBINATION THEREWITH FROM 0.0025% TO ABOUT 0.05% OF AN OIL-SOLUBLE CALCIUM PETROLEUM SULFONATE AND FROM 0.0015 TO 0.0042% OF OIL-SOLUBLE CALCIUM SALT OF OCTYLPHENOL-FORMALDEHYDE CONDENSATION PRODUCT.
Claim 2
Dependent Claim
48 words
A NON-CLOGGING FUEL OIL NORMALLY SUSCEPTIBLE TO CAUSE CLOGGING DUE TO THE PRESENCE OF CRACKED COMPONENTS IN THE FUEL OIL, CONTAINING IN COMBINATION THEREWITH FROM 0.0025% TO ABOUT 0.05% OF AN OIL-SOLUBLE CALCIUM PETROLEUM SULFONATE AND FROM 0.0015 TO 0.0042% OF OIL-SOLUBLE CALCIUM SALT OF OCTYLPHENOL-FORMALDEHYDE CONDENSATION PRODUCT.
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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |