Patent US2921029A successfully refreshed from Google Patents.
US2921029A
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US
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Synthetic lubricating oil
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-12-28
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Granted: 1960-01-12
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 Walter W Gleason
- 👤 William E Lifson
- 👤 Elfried F H Pennekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:32
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/28; C10M2207/282; C10M2207/287; C10M2207/288; C10M2207/289; C10M2207/30; C10M2207/302; C10M2207/304; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/11; C10M2209/111; C10M2209/112; C10M2219/00; C10M2219/04; C10M2219/044; C10M2219/08; C10M2219/082; C10M2219/084; C10M2219/085; C10M2219/10; C10M2219/104; C10M2219/108; C10M2221/00; C10M2221/04; C10M2221/043; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/10; C10M2229/00; C10M2229/02; C10M2229/04; C10M2229/05; C10N; C10N2010/00; C10N2010/04; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A SYNTHETIC LUBRICATING COMPOSITION SUITABLE FOR THE LUBRICATING OF MOVING PARTS OF COMBUSTION TURBINES IN AIRCRAFT ENGINES OVER A RANGE OF TEMPERATURES OF FROM ABOUT 450*F. TO ABOUT -65*F. UNDER CONDITIONS OF EXTREME PRESSURE WHICH COMPRISES A SYNERGESTIC MIXTURE OF ABOUT 2.0 TO 10.0 PERCENT BY WEIGHT OF TRICRESYL PHOSPHATE AND FROM 98.0 TO 90.0 PERCENT BY WEIGHT OF A BLEND OF ESTERS, SAID BLEND OF ESTERS CONSISTING ESSENTIALLY OF FROM 90.0 TO 95.0 PERCENT BY VOLUME OF A DIESTER AND FROM ABOUT 10.0 TO 5.0 PERCENT BY VOLUME OF A COMPLEX ESTER, SAID DIESTER BEING FORMED BY ESTERIFYING A BRANCHED CHAIN ALCOHOL WITH A DIBASIC ACID SELECTED FROM THE GROUP CONSISITING OF SEBACIC AND ADIPIC ACIDS AND SAID COMPLEX ESTER BEING FORMED BY ESTGERFYING 1 MOL OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 200 WITH 2 MOLS OF A HALF ESTER OF SEBACIC ACID AND 2-ETHYL HEXANOL, THE NUMERICAL RATIO OF THE VOL. PERCENT OF SAID COMPLEX ESTER IN SAID BLEND TO THE WT. PERCENT OF SAID TRICRESYL PHOSPHATE IN SAID COMPOSITION IS IN THE RATIO OF 1.1 TO 2.5:1.
Claim 2
Dependent Claim
184 words
A SYNTHETIC LUBRICATING COMPOSITION SUITABLE FOR THE LUBRICATING OF MOVING PARTS OF COMBUSTION TURBINES IN AIRCRAFT ENGINES OVER A RANGE OF TEMPERATURES OF FROM ABOUT 450*F. TO ABOUT -65*F. UNDER CONDITIONS OF EXTREME PRESSURE WHICH COMPRISES A SYNERGESTIC MIXTURE OF ABOUT 2.0 TO 10.0 PERCENT BY WEIGHT OF TRICRESYL PHOSPHATE AND FROM 98.0 TO 90.0 PERCENT BY WEIGHT OF A BLEND OF ESTERS, SAID BLEND OF ESTERS CONSISTING ESSENTIALLY OF FROM 90.0 TO 95.0 PERCENT BY VOLUME OF A DIESTER AND FROM ABOUT 10.0 TO 5.0 PERCENT BY VOLUME OF A COMPLEX ESTER, SAID DIESTER BEING FORMED BY ESTERIFYING A BRANCHED CHAIN ALCOHOL WITH A DIBASIC ACID SELECTED FROM THE GROUP CONSISITING OF SEBACIC AND ADIPIC ACIDS AND SAID COMPLEX ESTER BEING FORMED BY ESTGERFYING 1 MOL OF A POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 200 WITH 2 MOLS OF A HALF ESTER OF SEBACIC ACID AND 2-ETHYL HEXANOL, THE NUMERICAL RATIO OF THE VOL. PERCENT OF SAID COMPLEX ESTER IN SAID BLEND TO THE WT. PERCENT OF SAID TRICRESYL PHOSPHATE IN SAID COMPOSITION IS IN THE RATIO OF 1.1 TO 2.5:1.
References Cited (Backward Citations)
US2285855A
Cited
US2410608A
Cited
US2628974A
Cited
US2499984A
Cited
US2639266A
Cited
US2729665A
Cited
US2758975A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |