US2660666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secrecy transmission system
Assignee: Westinghouse Electric Corp
•
Filing: 1950-01-05
•
Granted: 1953-11-24
•
Expires: 1970-01-05
Abstract
No abstract record available.
Inventors
- 👤 Edward J Duckett
- 👤 George A Klotzbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:13
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2083653A
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US2134850A
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US2406841A
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US2405599A
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US2400950A
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US2445896A
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US2511899A
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US2441615A
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US2454907A
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US2486001A
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US2556677A
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US2477428A
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US2509789A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |