US2582968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical pulse secrecy communication system
Assignee: STC PLC
•
Filing: 1945-10-10
•
Granted: 1952-01-22
•
Expires: 1965-10-10
Abstract
No abstract record available.
Inventors
- 👤 Edmond M Deloraine
- 👤 Labin Emile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
H; H04; H04K; H04K3/00; H04K3/40; H04K3/42; H04K1/00; H04K1/02; H04K3/20; H04K3/22; H04K3/224; H04K3/228; H04K3/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1446433A
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US1973298A
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US2151747A
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US2227108A
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US2156374A
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US2262838A
Cited
US2266194A
Cited
US2279151A
Cited
US2381847A
Cited
GB541665A
Cited
US2392546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |