US2614211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency controlled radio relaying system
Assignee: AT&T Inc
•
Filing: 1950-05-13
•
Granted: 1952-10-14
•
Expires: 1970-05-13
Abstract
No abstract record available.
Inventors
- 👤 William M Goodall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:27
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2270023A
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US2287044A
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US2344813A
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US2405765A
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US2407213A
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US2407212A
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US2434293A
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US2501368A
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US2425013A
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US2516009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-14 | 1956-04-14 | 1956-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-14 | 1960-04-14 | 1960-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-14 | 1964-04-14 | 1964-10-14 | $7700.00 | Window Closed / Lapsed |