US2269692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm signaling system
Assignee: AT&T Inc
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Filing: 1937-08-31
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Granted: 1942-01-13
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Expires: 1957-08-31
Abstract
No abstract record available.
Inventors
- 👤 Victor E Rosene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:12
CPC Classifications
H; H04; H04M; H04M3/00; H04M3/40; H04J; H04J1/00; H04J1/02; H04J1/16; H04Q; H04Q1/00; H04Q1/18; H04Q1/20; H04Q1/22; H04Q1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-01-12 | 1945-07-14 | 1946-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-12 | 1949-07-14 | 1950-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-12 | 1953-07-14 | 1954-01-13 | $7700.00 | Window Closed / Lapsed |