US2856457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Printing telegraph distortion indicator
Assignee: International Standard Electric Corp
•
Filing: 1953-06-17
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Granted: 1958-10-14
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Expires: 1973-06-17
Abstract
No abstract record available.
Inventors
- 👤 Prior Hector Thomas
- 👤 Foulkes Edward Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:37
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/24; H04L1/248; H04L25/00; H04L25/02; H04L25/20; H04L25/24; H04L25/242; H04L25/245; H04L43/00; H04L43/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1816621A
Cited
US1867209A
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US1845994A
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US1873440A
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US1972941A
Cited
US1920454A
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US2342318A
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US2425307A
Cited
FR906654A
Cited
US2482932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |