Patent US2560266A successfully refreshed from Google Patents.
US2560266A
Expired / Lapsed
US
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Communicating system
Assignee: AT&T Inc
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Filing: 1948-09-25
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Granted: 1951-07-10
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Expires: 1968-09-25
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bacon
- 👤 Edward F Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:46
CPC Classifications
H; H04; H04M; H04M7/00; H04M7/08; H04L; H04L12/00; H04L12/54
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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |