US3000827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of lubricating a gas turbine engine
Assignee: Hercules Powder Co
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Filing: 1958-11-12
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Granted: 1961-09-19
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Expires: 1978-11-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin S Moler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:55
CPC Classifications
C; C10; C10M; C10M3/00; C10M105/00; C10M105/08; C10M105/32; C10M105/38; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD OF LUBRICATING A GAS TURBINE ENGINE WHICH COMPRISES MAINTAINING ON THE BEARINGS AND OTHER POINTS OF WEAR OF THE ENGINE A FILM OF A DIPENTAERYTHRITOL ESTER OF AN ALKANOIC ACID SELECTED FROM THE GROUP CONSISTING OF ALKANOIC ACIDS HAVING FROM 5 TO 10 CARBON ATOMS AND MIXTURES OF ALKANOIC ACIDS HAVING FROM 2 TO 12 CARBON ATOMS IN PROPORTIONS TO PROVIDE AN AVERAGE CHAIN LENGTH OF FROM 5 TO 10 CARBON ATOMS.
Claim 2
Independent Claim
74 words
A METHOD OF LUBRICATING A GAS TURBINE ENGINE WHICH COMPRISES MAINTAINING ON THE BEARINGS AND OTHER POINTS OF WEAR OF THE ENGINE A FILM OF A DIPENTAERYTHRITOL ESTER OF AN ALKANOIC ACID SELECTED FROM THE GROUP CONSISTING OF ALKANOIC ACIDS HAVING FROM 5 TO 10 CARBON ATOMS AND MIXTURES OF ALKANOIC ACIDS HAVING FROM 2 TO 12 CARBON ATOMS IN PROPORTIONS TO PROVIDE AN AVERAGE CHAIN LENGTH OF FROM 5 TO 10 CARBON ATOMS.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |