Patent US2815327A successfully refreshed from Google Patents.
US2815327A
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Stabilized pentaerythritol ester compositions
Assignee: Shell Development Co
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Filing: 1956-06-11
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Granted: 1957-12-03
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Expires: 1976-06-11
Abstract
No abstract record available.
Inventors
- 👤 Mehr Louis
- 👤 George H Dick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:13
CPC Classifications
C; C10; C10M; C10M169/00; C10M169/04; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10M2223/06; C10M2223/065; C10M2227/00; C10M2227/02; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/041; C10M2229/05; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
100 words
A COMPOSITION CONSISTING ESSENTIALLY OF A MAJOR AMOUNT OF A PENTAERYTHRITOL TETRAESTER OF A SATURATED FATTY ACID HAVING FROM 5 TO 7 CARBON ATOMS PER MOLECULE AND MINOR AMOUNTS BETWEEN ABOUT 0.1% AND ABOUT 2.5% BY WEIGHT, SUFFICIENT TO SUBSTANTIALLY MINIMIZE THE INCREASE IN VISCOSITY AND ACIDITY THEREOF DUE TO THERMAL AND OXIDATIVE DEGRADATION AT HIGH TEMPERATURES, OF BOTH A DIARYLAMINE AND A THIODIARYLAMINE, WHEREIN EACH ARYL RADICAL IS SELECTED FROM THE GROUP CONSISTING OF PHENYL, NAPHTHYL, ALKYLATED PHENYL AND ALKYLATED NAPHTHYL RADICALS ANY ALKYL SUBSTITUENTS FORMING A PART OF SAID RADICALS HAVING FROM 1 TO 4 CARBON ATOMS EACH.
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) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |