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US2653996A
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US
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Electric telegraph system
Assignee: International Standard Electric Corp
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Filing: 1951-11-10
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Granted: 1953-09-29
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Expires: 1971-11-10
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:50
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/004; H04L1/0056; H04L1/0061; H03; H03M; H03M13/00; H03M13/47; H03M13/51; H04L1/0041; H04L1/0045; H04L1/0057; H04L5/00; H04L5/02; H04L5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |