Patent US2682575A successfully refreshed from Google Patents.
US2682575A
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US
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Time division multiplex system
Assignee: AT&T Inc
•
Filing: 1944-10-19
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Granted: 1954-06-29
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Expires: 1964-10-19
Abstract
No abstract record available.
Inventors
- 👤 James O Edson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:15
CPC Classifications
H; H04; H04J; H04J3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1918252A
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US2048081A
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US2172354A
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US2157434A
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US2262838A
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US2313906A
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US2403210A
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US2414265A
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US2478919A
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US2478920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-28 | 1957-12-28 | 1958-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-28 | 1961-12-28 | 1962-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-28 | 1965-12-28 | 1966-06-29 | $7700.00 | Window Closed / Lapsed |