US2944252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intruder alarm system
Assignee: American District Telegraph Co
•
Filing: 1957-01-07
•
Granted: 1960-07-05
•
Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Manfred W Muehter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:48
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US504980A
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US1145224A
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US2009447A
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US2419957A
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US2397906A
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US2640975A
Cited
US2611025A
Cited
US2779936A
Cited
US2814033A
Cited
US2817074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |