Patent US2680781A successfully refreshed from Google Patents.
US2680781A
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US
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Translating arrangement
Assignee: AT&T Inc
•
Filing: 1949-11-08
•
Granted: 1954-06-08
•
Expires: 1969-11-08
Abstract
No abstract record available.
Inventors
- 👤 Robert C Avery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:21
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1811146A
Cited
US1721640A
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US1721920A
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US1903019A
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US2108140A
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US2201573A
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US2409063A
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US2355908A
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US2468300A
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US2528269A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |