Patent US6020883A successfully refreshed from Google Patents.
US2566010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone system
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1949-01-29
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Granted: 1951-08-28
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Expires: 1969-01-29
Abstract
No abstract record available.
Inventors
- 👤 Wicks John
- 👤 Otho D Grandstaff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:18
CPC Classifications
H; H04; H04Q; H04Q3/00; H04Q3/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1475201A
Cited
US2025145A
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US2119239A
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US2155176A
Cited
US2288251A
Cited
US2306236A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |