US2539797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal transmission system
Assignee: RCA Corp
•
Filing: 1946-05-09
•
Granted: 1951-01-30
•
Expires: 1966-05-09
Abstract
No abstract record available.
Inventors
- 👤 Smith James Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:19
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00095; H04N1/00103
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1844950A
Cited
US2001747A
Cited
US2143875A
Cited
US2176949A
Cited
US2200344A
Cited
US2262838A
Cited
US2272070A
Cited
US2257282A
Cited
US2277261A
Cited
US2306386A
Cited
GB557563A
Cited
US2384379A
Cited
US2390608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |