US2511748A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antioxidants for mineral oil lubricants and compositions containing the same
Assignee: Gulf Oil Corp
•
Filing: 1948-12-21
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Granted: 1950-06-13
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Expires: 1968-12-21
Abstract
No abstract record available.
Inventors
- 👤 Herschel G Smith
- 👤 Troy L Cantrell
- 👤 John G Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:15
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/067; C10N; C10N2040/00; C10N2040/135; C10N2050/00; C10N2050/10; C10N2070/00; C10N2070/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
53 words
THE PROCESS OF PREPARING AN ADDITION AGENT FOR MINERAL OIL LUBRICANTS WHICH COMPRISES HEATING 1 MOL OF AN N-DIETHYLTOLUIDINE WITH FROM 0.5 TO 1 MOL OF FORMALDEHYDE IN THE PRESENCE OF AN ACTIVATED CLAY CATALYST AT A TEMPERATURE NOT IN EXCESS OF 350*F. TO CONDENSE TOGEHER THE REACTANTS, AND RECOVERING THE CONDENSATION PROD-UCT.
Claim 2
Dependent Claim
53 words
THE PROCESS OF PREPARING AN ADDITION AGENT FOR MINERAL OIL LUBRICANTS WHICH COMPRISES HEATING 1 MOL OF AN N-DIETHYLTOLUIDINE WITH FROM 0.5 TO 1 MOL OF FORMALDEHYDE IN THE PRESENCE OF AN ACTIVATED CLAY CATALYST AT A TEMPERATURE NOT IN EXCESS OF 350*F. TO CONDENSE TOGEHER THE REACTANTS, AND RECOVERING THE CONDENSATION PROD-UCT.
Claim 3
Dependent Claim
53 words
A LUBRICANT COMPOSITION COMPRISING A MAJOR AMOUNT OF A MINERAL LUBRICATING OIL, AND A MINOR AMOUNT, FROM 0.001 TO 1.0 PER CENT BY WEIGHT OF SAID OIL, OF A NON-RESINOIUS CONDENSATION PRODUCT OF A N-DIETHYLTOLUIDINE WITH FROM 0.5 TO 1 MOL OF FORMALDEHYDE, SAID PRODUCT BEING OBTAINED BY THE PROCESS OF CLAIM 1.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |