US3012226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective signaling device
Assignee: AT&T Inc
•
Filing: 1956-11-14
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Granted: 1961-12-05
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Expires: 1976-11-14
Abstract
No abstract record available.
Inventors
- 👤 Henry H Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:58
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/02; H04W88/022; H04W88/025; H04W88/028; G; G11; G11C; G11C19/00; G11C19/02; G11C19/04; H03; H03K; H03K23/00; H03K23/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2022219A
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US2418521A
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US2451489A
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US2600648A
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US2740948A
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US2697178A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-04 | 1965-06-05 | 1965-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-04 | 1969-06-05 | 1969-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-04 | 1973-06-05 | 1973-12-05 | $7700.00 | Window Closed / Lapsed |