US2979706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio warning system
Assignee: Individual
•
Filing: 1956-07-02
•
Granted: 1961-04-11
•
Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Avery H Simon
- 👤 Richard H Tracy
- 👤 Fern A Yarbrough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:55
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/3827; G; G08; G08B; G08B25/00; G08B25/01; G08B25/012
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1497194A
Cited
US1863374A
Cited
US1986488A
Cited
US1982771A
Cited
US1950731A
Cited
US2022991A
Cited
US2064994A
Cited
US2140387A
Cited
US2154480A
Cited
US2250834A
Cited
US2249560A
Cited
US2371491A
Cited
US2233026A
Cited
US2283523A
Cited
US2577751A
Cited
US2378299A
Cited
US2522615A
Cited
US2474757A
Cited
US2566121A
Cited
US2673975A
Cited
US2574696A
Cited
US2695402A
Cited
US2791762A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |