Patent US2640123A successfully refreshed from Google Patents.
US2640123A
Expired / Lapsed
US
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Smoke detector relay and resetting mechanism
Assignee: CO Two Fire Equipment Co
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Filing: 1949-02-03
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Granted: 1953-05-26
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Expires: 1969-02-03
Abstract
No abstract record available.
Inventors
- 👤 Cahusac Clarence Noel
- 👤 Frank B Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:00
CPC Classifications
G; G08; G08B; G08B17/00; G08B17/10; G08B17/103; G08B17/107; G08B17/11; G08B17/113
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US727567A
Cited
US1058178A
Cited
US1654102A
Cited
US2062915A
Cited
US2281687A
Cited
US2565312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |