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US2649767A
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Alternating current drop-out means for thermoelectric safety shutoff devices
Assignee: Milwaukee Gas Specialty Co
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Filing: 1950-12-27
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Granted: 1953-08-25
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Expires: 1970-12-27
Abstract
No abstract record available.
Inventors
- 👤 Russell B Matthews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:29
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/105; Y; Y10; Y10T; Y10T137/00; Y10T137/1407
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US390245A
Cited
US733097A
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US1252312A
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US2290047A
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US2262061A
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US2340234A
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US2299286A
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US2318136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |