US2551660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant system for gas turbine aero engines
Assignee: Power Jets Research and Development Ltd
•
Filing: 1945-11-02
•
Granted: 1951-05-08
•
Expires: 1965-11-02
Abstract
No abstract record available.
Inventors
- 👤 Feilden Geoffrey Bertra Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:44
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE343552C
Cited
US869138A
Cited
US1090773A
Cited
US1211406A
Cited
US1329038A
Cited
US1595432A
Cited
US1911450A
Cited
US1680936A
Cited
GB275259A
Cited
GB305204A
Cited
US1732579A
Cited
GB336352A
Cited
US2334942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |