US2583088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm signaling system
Assignee: AT&T Inc
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Filing: 1950-09-13
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Granted: 1952-01-22
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Expires: 1970-09-13
Abstract
No abstract record available.
Inventors
- 👤 Charles E Clutts
- 👤 George A Pullis
- 👤 Alfred K Schenck
- 👤 Laurence A Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:10
CPC Classifications
G; G08; G08B; G08B25/00; G08B25/01; G08B25/014
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |