Patent US2918526A successfully refreshed from Google Patents.
US2918526A
Expired / Lapsed
US
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Electric telegraph systems
Assignee: International Standard Electric Corp
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Filing: 1954-11-26
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Granted: 1959-12-22
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Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Wright Esmond Philip Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:46
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) | 1962-12-21 | 1963-06-22 | 1963-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-21 | 1967-06-22 | 1967-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-21 | 1971-06-22 | 1971-12-22 | $7700.00 | Window Closed / Lapsed |