US2838227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preventing or reducing stalling of the early rows of axial-flow compressor blades ofgas turbine engines
Assignee: Armstrong Siddeley Motors Ltd
•
Filing: 1954-12-09
•
Granted: 1958-06-10
•
Expires: 1974-12-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas Albert
- 👤 Marlow John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:54
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/16; F01D17/162; F02; F02C; F02C7/00; F02C7/04; F02C7/042; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/54; F04D29/56; F04D29/563
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US212004A
Cited
AT78432B
Cited
US2083447A
Cited
US2613029A
Cited
FR1010604A
Cited
US2689680A
Cited
GB692355A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |