US2765221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon oil compositions
Assignee: Shell Development Co
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Filing: 1955-12-12
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Granted: 1956-10-02
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 Theodore R Lusebrink
- 👤 Jr Webster M Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:19
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/102; C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/26; C10L1/2608; C10L1/2616; C10L1/2633; C10L1/2641; C10L1/265; C10L1/28; C10L1/285
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A LIQUID HYDROCARBON FUEL BOILING BELOW ABOUT 600* F. CONTAINING AN ANTI-WICKING ADDITIVE COMBINATION CONSISTING ESSENTIALLY OF A C1-C7-HYDROCARBYL POLYSILOXANE HAVING A VISCOSITY AT 25* C. OF FROM 0.65 TO ABOUT 60,000 CENTISTOKES AND BEING SOLUBLE TO THE EXTENT OF AT LEAST 1% BY WEIGHT IN TOLUENE AND A PHOSPHORUS COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
54 words
A LIQUID HYDROCARBON FUEL BOILING BELOW ABOUT 600* F. CONTAINING AN ANTI-WICKING ADDITIVE COMBINATION CONSISTING ESSENTIALLY OF A C1-C7-HYDROCARBYL POLYSILOXANE HAVING A VISCOSITY AT 25* C. OF FROM 0.65 TO ABOUT 60,000 CENTISTOKES AND BEING SOLUBLE TO THE EXTENT OF AT LEAST 1% BY WEIGHT IN TOLUENE AND A PHOSPHORUS COMPOUND HAVING THE FORMULA:
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) | 1959-10-02 | 1960-04-02 | 1960-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-02 | 1964-04-02 | 1964-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-02 | 1968-04-02 | 1968-10-02 | $7700.00 | Window Closed / Lapsed |