US2704840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fire alarm system
Assignee: MORSE SIGNAL DEVICES
•
Filing: 1951-04-28
•
Granted: 1955-03-22
•
Expires: 1971-04-28
Abstract
No abstract record available.
Inventors
- 👤 Leslie A Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:08
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2335382A
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US2349629A
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US2402312A
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US2408660A
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US2452942A
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US2411752A
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US2442830A
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US2646556A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-21 | 1958-09-20 | 1959-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-21 | 1962-09-20 | 1963-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-21 | 1966-09-20 | 1967-03-22 | $7700.00 | Window Closed / Lapsed |