Patent US2883454A successfully refreshed from Google Patents.
US2883454A
Expired / Lapsed
US
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Signalling systems
Assignee: RCA Corp
•
Filing: 1952-11-08
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Granted: 1959-04-21
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Expires: 1972-11-08
Abstract
No abstract record available.
Inventors
- 👤 George C Sziklai
- 👤 Robert D Lohman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:06
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/08; H04N5/14; H04N5/16; H04N5/18; H04N5/185; H04N5/21; H04N5/213
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2299944A
Cited
US2647161A
Cited
US2559038A
Cited
US2627039A
Cited
US2570938A
Cited
US2739190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-20 | 1962-10-20 | 1963-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-20 | 1966-10-20 | 1967-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-20 | 1970-10-20 | 1971-04-21 | $7700.00 | Window Closed / Lapsed |