Patent US3900410A successfully refreshed from Google Patents.
US3900410A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricating oil compositions containing trialkyl-substituted phenols and benzotriazole
Assignee: Ethyl Corp
•
Filing: 1973-04-23
•
Granted: 1975-08-19
•
Expires: 1993-04-23
Abstract
Abstract Lubricating oil is protected against oxidative degradation by inclusion of a 2,6-di-C4-20-tert-alkyl-4-n-C8-24 alkylphenol, e.g., 2,6-di-tert-butyl-4-n-dodecylphenol, and benzotriazole.
Inventors
- 👤 Robert E Malec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:41
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C37/00; C07C37/11; C07C37/16; C10M2205/00; C10M2205/02; C10M2205/026; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/027; C10M2209/00; C10M2209/02; C10M2209/08; C10M2209/084; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/046; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/045; C10N; C10N2010/00; C10N2010/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
15 words
A MINERAL LUBRICATING OIL COMPOSITION CONTAINING AN ANTIOXIDANT AMOUNT OF A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
15 words
A MINERAL LUBRICATING OIL COMPOSITION CONTAINING AN ANTIOXIDANT AMOUNT OF A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
14 words
A lubricating oil composition of claim 1 wherein said antioxidant compounds are 2,6-di-tert-butyl-4-n-C8-24 24-alkylphenols.
Claim 4
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-octylphenol.
Claim 5
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-decylphenol.
Claim 6
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-dodecylphenol.
Claim 7
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-tetradecylphenol.
Claim 8
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-hexadecylphenol.
Claim 9
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-octadecylphenol.
Claim 10
Dependent Claim
13 words
A lubricating oil composition of claim 2 wherein said antioxidant compound is 2,6-di-tert-butyl-4-n-eicosylphenol.
References Cited (Backward Citations)
US2202877A
Cited
US2809164A
Cited
US2890170A
Cited
US3032502A
Cited
US3173871A
Cited
US3413227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |