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US2426225A
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Communication system
Assignee: STC PLC
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Filing: 1944-04-20
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Granted: 1947-08-26
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Expires: 1964-04-20
Abstract
No abstract record available.
Inventors
- 👤 Irving A Krause
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:40
CPC Classifications
H; H04; H04K; H04K1/00; H04K1/02; G; G01; G01S; G01S1/00; G01S1/02; H04B; H04B14/00; H04B14/02; H04J; H04J3/00; H04K1/006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR768022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-25 | 1951-02-24 | 1951-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-25 | 1955-02-24 | 1955-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-25 | 1959-02-24 | 1959-08-26 | $7700.00 | Window Closed / Lapsed |