US2755224A
Expired / Lapsed
US
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Process for improving lubricating oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-12-18
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Granted: 1956-07-17
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Expires: 1972-12-18
Abstract
No abstract record available.
Inventors
- 👤 David W Young
- 👤 Byron M Vanderbit
- 👤 Delmer L Cottle
- 👤 Arnold J Morway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:02
CPC Classifications
C; C10; C10M; C10M159/00; C10M159/02; C10M159/04; C08; C08K; C08K5/00; C08K5/02; C10M2203/00; C10M2203/10; C10M2205/00; C10M2207/00; C10M2207/04; C10M2207/28; C10M2207/282; C10M2207/283; C10M2207/30; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/107; C10M2209/108; C10M2211/00; C10M2211/02; C10M2211/022; C10M2211/04; C10M2211/042; C10M2211/044; C10M2211/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2219/10; C10M2219/104; C10M2219/108; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2050/00; C10N2050/10; C10N2060/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
THE PROCESS OF INCREASING VISCOSITY AND IMPROVING THE VISCOSITY INDEX OF A LUBRICATING OIL WHICH CONSISTS ESSENTIALLY IN MIXING 0.1 TO 5% BY WEIGHT OF A POLYHALOGENATED C1-C2 HYDROCARBON INTO SAID OIL AND HEATING THE MIXTURE AT A TEMPERATURE OF 175* TO 400* C. FOR 10 MINUTES TO 10 HOURS.
Claim 2
Dependent Claim
50 words
THE PROCESS OF INCREASING VISCOSITY AND IMPROVING THE VISCOSITY INDEX OF A LUBRICATING OIL WHICH CONSISTS ESSENTIALLY IN MIXING 0.1 TO 5% BY WEIGHT OF A POLYHALOGENATED C1-C2 HYDROCARBON INTO SAID OIL AND HEATING THE MIXTURE AT A TEMPERATURE OF 175* TO 400* C. FOR 10 MINUTES TO 10 HOURS.
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) | 1959-07-17 | 1960-01-16 | 1960-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-17 | 1964-01-16 | 1964-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-17 | 1968-01-16 | 1968-07-17 | $7700.00 | Window Closed / Lapsed |