US2493351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure type fire detecting system
Assignee: Thomas A Edison Inc
•
Filing: 1946-04-13
•
Granted: 1950-01-03
•
Expires: 1966-04-13
Abstract
No abstract record available.
Inventors
- 👤 Harry S Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:52
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/02; H01H37/32; H01H37/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1653438A
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US1665381A
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US1885457A
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US1801560A
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US1986479A
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US1819124A
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US1886439A
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US2063703A
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US2187124A
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US2275949A
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US2376892A
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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) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |