Patent US2715677A successfully refreshed from Google Patents.
US2715677A
Expired / Lapsed
US
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Radiotelegraph system
Assignee: Individual
•
Filing: 1951-07-06
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Granted: 1955-08-16
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Expires: 1971-07-06
Abstract
No abstract record available.
Inventors
- 👤 Richard R Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:07
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)
US1948671A
Cited
US2033948A
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US2211750A
Cited
US2232390A
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US2253867A
Cited
US2316017A
Cited
US2341649A
Cited
US2654025A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-08-15 | 1959-02-14 | 1959-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-08-15 | 1963-02-14 | 1963-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-08-15 | 1967-02-14 | 1967-08-16 | $7700.00 | Window Closed / Lapsed |