US2657575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Asymmetric adjustable supersonic nozzle
Assignee: Individual
•
Filing: 1947-08-21
•
Granted: 1953-11-03
•
Expires: 1967-08-21
Abstract
No abstract record available.
Inventors
- 👤 Harry J Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:38
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/09; F01; F01D; F01D9/00; F01D9/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2405723A
Cited
US1376178A
Cited
US2171817A
Cited
US2342262A
Cited
GB580995A
Cited
US2418488A
Cited
US2570629A
Cited
US2608053A
Cited
US2593420A
Cited
US2540594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |