Patent US2554794A successfully refreshed from Google Patents.
US2554794A
Expired / Lapsed
US
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Transmitting apparatus
Assignee: AT&T Teletype Corp
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Filing: 1948-11-05
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Granted: 1951-05-29
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Expires: 1968-11-05
Abstract
No abstract record available.
Inventors
- 👤 Martha W C Potts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
H; H04; H04L; H04L13/00; H04L13/02; H04L13/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1947249A
Cited
US2224244A
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US2131322A
Cited
US2230681A
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US2403009A
Cited
US2382251A
Cited
US2431646A
Cited
US2423339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |