US3790481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic lubricants for aero gas turbines
Assignee: BP PLC
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Filing: 1971-04-30
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Granted: 1974-02-05
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Expires: 1991-04-30
Abstract
Abstract AN AERO GAS TURBINE LUBRICANT HAVING OUTSTANDING THERMAL AND OXIDATION STABILITY, CORROSION RESISTANCE AND LOADCARRYING ABILITY AND GOOD LOW TEMPERATURE FLUIDITY IS BASED ON A HINDERED ESTER AND CONTAINS AN AROMATIC AMINE ANTIOXIDANT, A COPPER PASSIVATOR OF THE AZOLE OR SALICYLALDEHYDE SEMICARBAZONE TYPE AND A NEUTRAL PHOSPHATE AND CORROSION INHIBITOR AND A HYDROLYTIC STABILITY IMPROVER MAY ALSO BE INCLUDED N THE LUBRICANT. MAY ALSO BE INCLUDED IN THE LUBRICANT.
Inventors
- 👤 D Byford
- 👤 P Blanchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:06
CPC Classifications
C; C10; C10M; C10M3/00; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/025; C10M2207/10; C10M2207/12; C10M2207/121; C10M2207/123; C10M2207/129; C10M2207/22; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/284; C10M2207/285; C10M2207/286; C10M2207/30; C10M2207/34; C10M2209/00; C10M2209/10; C10M2209/103; C10M2209/109; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/062; C10M2215/064; C10M2215/065; C10M2215/10; C10M2215/102; C10M2215/14; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30; C10M2219/00; C10M2219/10; C10M2219/104; C10M2219/108; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2030/00; C10N2030/08; C10N2040/00; C10N2040/12; C10N2040/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |