US2471473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission system
Assignee: STC PLC
•
Filing: 1945-03-19
•
Granted: 1949-05-31
•
Expires: 1965-03-19
Abstract
No abstract record available.
Inventors
- 👤 Jr Norman H Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:35
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1770485A
Cited
US2053091A
Cited
US2125491A
Cited
US2104544A
Cited
US2403890A
Cited
US2407336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |