Patent US2657262A successfully refreshed from Google Patents.
US2657262A
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US
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Carrier telegraph system
Assignee: International Standard Electric Corp
•
Filing: 1951-09-18
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Granted: 1953-10-27
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Expires: 1971-09-18
Abstract
No abstract record available.
Inventors
- 👤 Prior Hector Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:45
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/02; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/14; H04B3/142; H04L; H04L1/00; H04L1/02; H04L25/00; H04L25/02; H04L25/03; H04L25/03878; H04L27/00; H04L27/02; H04L27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2552362A
Cited
US2568019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-26 | 1957-04-27 | 1957-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-26 | 1961-04-27 | 1961-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-26 | 1965-04-27 | 1965-10-27 | $7700.00 | Window Closed / Lapsed |