US2787657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph repeaters
Assignee: International Standard Electric Corp
•
Filing: 1949-03-29
•
Granted: 1957-04-02
•
Expires: 1969-03-29
Abstract
No abstract record available.
Inventors
- 👤 Terry Victor John
- 👤 Desmond Sydney Ridler
- 👤 Donald Adams Weir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:52
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/24; H04L1/248; H04L25/00; H04L25/02; H04L25/12; H04L25/20; H04L25/24; H04L25/242; H04L25/245; H04L43/00; H04L43/50; H04L5/00; H04L5/14; H04L5/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2401729A
Cited
US2373134A
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US2454089A
Cited
US2419540A
Cited
US2427533A
Cited
US2474490A
Cited
US2456825A
Cited
US2561434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |