US2607007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective signal circuits
Assignee: STC PLC
•
Filing: 1946-08-17
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Granted: 1952-08-12
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Expires: 1966-08-17
Abstract
No abstract record available.
Inventors
- 👤 Gilbert R Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L27/144; H04L27/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043671A
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US2049376A
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US2094351A
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US2475074A
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US2426204A
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US2498253A
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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) | 1955-08-12 | 1956-02-11 | 1956-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-12 | 1960-02-11 | 1960-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-12 | 1964-02-11 | 1964-08-12 | $7700.00 | Window Closed / Lapsed |