Patent US2947816A successfully refreshed from Google Patents.
US2947816A
Expired / Lapsed
US
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Telegraph repeater
Assignee: AT&T Inc
•
Filing: 1956-08-22
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Granted: 1960-08-02
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Expires: 1976-08-22
Abstract
No abstract record available.
Inventors
- 👤 John L Hysko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:11
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; C; C07; C07F; C07F11/00; C07F11/005; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C08; C08G; C08G77/00; C08G77/04; C08G77/38; C08G77/382; C08G77/398; C14; C14C; C14C9/00; D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; D06M15/00; D06M15/19; D06M15/37; D06M15/643
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2502942A
Cited
US2770670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |