US2687377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant
Assignee: California Research LLC
•
Filing: 1951-12-11
•
Granted: 1954-08-24
•
Expires: 1971-12-11
Abstract
No abstract record available.
Inventors
- 👤 William T Stewart
- 👤 Goldschmidt Alfred
- 👤 Oliver L Harle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/04; C10M2207/046; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/104; C10M2209/105; C10M2209/106; C10M2209/107; C10M2209/108; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/042; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/066; C10M2215/068; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/26; C10M2215/30; C10M2217/00; C10M2217/04; C10M2217/046; C10M2217/06; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/086; C10M2219/087; C10M2219/089; C10M2219/10; C10M2219/104; C10M2219/108; C10N; C10N2040/00; C10N2040/08; C10N2040/135; C10N2040/30; C10N2040/32; C10N2040/34; C10N2040/36; C10N2040/38; C10N2040/40; C10N2040/42; C10N2040/44; C10N2040/50; C10N2050/00; C10N2050/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A LUBRICANT COMPOSITION WHICH COMPRISES A MAJOR PORTION OF POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISCOSITY WHICH IS SUSCEPTIBLE TO OXIDATIVE DETERIORATON, TOGETHER WITH FROM ABOUT 0.1 TO 5 PER CENT, BY WEIGHT, OF A DIARYLAMINE SELECTED FROM THE GROUP CONSISTING OF PHENYL-A-NAPHTHYLAMINE, P-HYDROXYDIPHENYLAMINE, DIPHENYL-P-PHENYLENE DIAMINE, DIPHENYLAMINE, PHENOTHIAZINE, DI - B - NAPHTHYLAMINE, P - ISOPROPOXY DIPHENYLAMINE - B - NAPHTHYLAMINE, DI(P - ISOPROPYLPHENYL)P - PHENYLENE DIAMINE, DI-B-NAPHTHYL-P-PHENYLENE DIAMINE, AND P,P'' -DIISOOCTYL DIPHENYLAMINE, AND FROM ABOUT 0.5 TO 10 PER CENT, BY WEIGHT, OF AN ALIPHATIC AMINE SELECTED FROM THE GROUP CONSISTING OF TETRAETHYLENEPENTAMINE, TRIISOPROPANOLAMINE, POLY ETHYLENE DIAMINE, AMINOETHYLMORPHOLINE, TRIETHANOLAMINE, DIPROPYLENETRIAMINE, AMINOETHYLETHANOLAMINE, HYDROXYETHYDIETHYLENETRIAMINE, N1,N5 - DIOLEOYTETRAETHYLENEPENTAMINE, AND TRIETHANOLAMINE TRISTEARATE, SAID DIARYLAMINE AND SAID ALIPHATIC AMINE EACH BEING SOLUBLE IN SAID POLYALKYLENE GLYCOL POLYMERIC MATERIAL TO THE EXTENT OF AT LEAST 0.25 PER CENT, BY WEIGHT.
Claim 2
Dependent Claim
136 words
A LUBRICANT COMPOSITION WHICH COMPRISES A MAJOR PORTION OF POLYALKYLENE GLYCOL POLYMERIC MATERIAL OF LUBRICATING OIL VISCOSITY WHICH IS SUSCEPTIBLE TO OXIDATIVE DETERIORATON, TOGETHER WITH FROM ABOUT 0.1 TO 5 PER CENT, BY WEIGHT, OF A DIARYLAMINE SELECTED FROM THE GROUP CONSISTING OF PHENYL-A-NAPHTHYLAMINE, P-HYDROXYDIPHENYLAMINE, DIPHENYL-P-PHENYLENE DIAMINE, DIPHENYLAMINE, PHENOTHIAZINE, DI - B - NAPHTHYLAMINE, P - ISOPROPOXY DIPHENYLAMINE - B - NAPHTHYLAMINE, DI(P - ISOPROPYLPHENYL)P - PHENYLENE DIAMINE, DI-B-NAPHTHYL-P-PHENYLENE DIAMINE, AND P,P'' -DIISOOCTYL DIPHENYLAMINE, AND FROM ABOUT 0.5 TO 10 PER CENT, BY WEIGHT, OF AN ALIPHATIC AMINE SELECTED FROM THE GROUP CONSISTING OF TETRAETHYLENEPENTAMINE, TRIISOPROPANOLAMINE, POLY ETHYLENE DIAMINE, AMINOETHYLMORPHOLINE, TRIETHANOLAMINE, DIPROPYLENETRIAMINE, AMINOETHYLETHANOLAMINE, HYDROXYETHYDIETHYLENETRIAMINE, N1,N5 - DIOLEOYTETRAETHYLENEPENTAMINE, AND TRIETHANOLAMINE TRISTEARATE, SAID DIARYLAMINE AND SAID ALIPHATIC AMINE EACH BEING SOLUBLE IN SAID POLYALKYLENE GLYCOL POLYMERIC MATERIAL TO THE EXTENT OF AT LEAST 0.25 PER CENT, BY WEIGHT.
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) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |