Patent US2906611A successfully refreshed from Google Patents.
US2906611A
Expired / Lapsed
US
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Color stable heater oils
Assignee: Standard Oil Co
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Filing: 1954-07-28
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Granted: 1959-09-29
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Expires: 1974-07-28
Abstract
No abstract record available.
Inventors
- 👤 Robert F Schnaith
- 👤 Mathew L Kalinowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:49
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/222; C10L1/2222; C10L1/228; C10L1/2283
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A COLOR STABLE HEATING OIL CONSISTING ESSENTIALLY OF A NORMALLY COLOR UNSTABLE BLEND OF AT LEAST TWO VIRGIN DISTILLATE FRACTIONS DERIVED FROM DISTINCT CRUDE SOURCES, SAID BLEND BOILING IN THE RANGE 300* TO 750*F. AND CHIEFLY ABOVE ABOUT 375*F., FROM ABOUT 0.0005% TO ABOUT 0.1% TO AN N-ALKYL ALKYLENE COMPOUND HAVING THE GENERAL FORMULA RNHCH2CH2CH2NH2, WHEREIN R IS AN ALKYL RADICAL CONTAINING FROM ABOUT 16 TO ABOUT 20 CARBON ATOMS AND FROM ABOUT 0.00001% TO ABOUT 0.01% OF AN OIL SOLUBLE HYDROXY BENZALDEHYDE DIIMINE HAVING THE GENERAL FORMULA
Claim 2
Dependent Claim
88 words
A COLOR STABLE HEATING OIL CONSISTING ESSENTIALLY OF A NORMALLY COLOR UNSTABLE BLEND OF AT LEAST TWO VIRGIN DISTILLATE FRACTIONS DERIVED FROM DISTINCT CRUDE SOURCES, SAID BLEND BOILING IN THE RANGE 300* TO 750*F. AND CHIEFLY ABOVE ABOUT 375*F., FROM ABOUT 0.0005% TO ABOUT 0.1% TO AN N-ALKYL ALKYLENE COMPOUND HAVING THE GENERAL FORMULA RNHCH2CH2CH2NH2, WHEREIN R IS AN ALKYL RADICAL CONTAINING FROM ABOUT 16 TO ABOUT 20 CARBON ATOMS AND FROM ABOUT 0.00001% TO ABOUT 0.01% OF AN OIL SOLUBLE HYDROXY BENZALDEHYDE DIIMINE HAVING THE GENERAL FORMULA
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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |