US2844711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple frequency channel multiplex communication system
Assignee: Motorola Solutions Inc
•
Filing: 1953-06-08
•
Granted: 1958-07-22
•
Expires: 1973-06-08
Abstract
No abstract record available.
Inventors
- 👤 John F Byrne
- 👤 William L Firestone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:25
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/002; H04B14/006; H04B14/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1910977A
Cited
US2233183A
Cited
US2298409A
Cited
US2514425A
Cited
US2421727A
Cited
US2691065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |