US2652636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio echo training system
Assignee: Individual
•
Filing: 1946-05-24
•
Granted: 1953-09-22
•
Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Garman
- 👤 Curtis R Haupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:12
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4052; G01S7/4004; G01S7/4021; G01S7/4082
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2215365A
Cited
US2199066A
Cited
US2433681A
Cited
US2416088A
Cited
US2539511A
Cited
US2399661A
Cited
US2405591A
Cited
US2406751A
Cited
US2415831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |