US2487772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal-seeking receiver for amplitude modulation and frequency modulation signals
Assignee: COLONIAL RADIO Corp
•
Filing: 1945-08-08
•
Granted: 1949-11-08
•
Expires: 1965-08-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Madison G Nichoison
- 👤 John C Pontius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:27
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/18; H03J7/30; H03J7/305; H03J7/02; H03J7/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2189282A
Cited
US2369542A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-07 | 1953-05-09 | 1953-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-07 | 1957-05-09 | 1957-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-07 | 1961-05-09 | 1961-11-08 | $7700.00 | Window Closed / Lapsed |