US2656147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling of gas turbine rotors
Assignee: English Electric Co Ltd
•
Filing: 1947-10-08
•
Granted: 1953-10-20
•
Expires: 1967-10-08
Abstract
No abstract record available.
Inventors
- 👤 Brownhill Frank Denison
- 👤 Wolff Paul Heinz Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:10
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/08; F01D5/081; F01D5/084; F01D11/00; F01D11/001; F05; F05D; F05D2240/00; F05D2240/80; F05D2240/81
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB452412A
Cited
US2149510A
Cited
US2141401A
Cited
US2213940A
Cited
US2241782A
Cited
GB543985A
Cited
GB579316A
Cited
GB578191A
Cited
US2489683A
Cited
US2440069A
Cited
US2452782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |