US2905747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secrecy systems
Assignee: RCA Corp
•
Filing: 1953-09-22
•
Granted: 1959-09-22
•
Expires: 1973-09-22
Abstract
No abstract record available.
Inventors
- 👤 Marshall C Kidd
- 👤 James J Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04K; H04K1/00; H04K1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1223376A
Cited
US2645677A
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US2656406A
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US2567545A
Cited
US2656411A
Cited
US2605397A
Cited
US2664460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |