US2989707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compatible single sideband radio transmission system
Assignee: Individual
•
Filing: 1956-09-26
•
Granted: 1961-06-20
•
Expires: 1976-09-26
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Kahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:14
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/68; H03; H03C; H03C1/00; H03C1/52; H03C1/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2048080A
Cited
US2387652A
Cited
US2666133A
Cited
US2761105A
Cited
US2793349A
Cited
US2808504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |