US2718589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio relay system
Assignee: AT&T Inc
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Filing: 1950-06-29
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Granted: 1955-09-20
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Elliot M Staples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:34
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US897662A
Cited
GB108213A
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US1765538A
Cited
US1786805A
Cited
GB344444A
Cited
GB348543A
Cited
US1967887A
Cited
US2332300A
Cited
US2498695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |