Patent US2645238A successfully refreshed from Google Patents.
US2645238A
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Safety control device
Assignee: Milwaukee Gas Specialty Co
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Filing: 1947-03-10
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Granted: 1953-07-14
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Expires: 1967-03-10
Abstract
No abstract record available.
Inventors
- 👤 John H Thornbery
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:02
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107; Y; Y10; Y10T; Y10T137/00; Y10T137/1407; Y10T137/1516; Y10T137/8593; Y10T137/87917; Y10T137/88046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR603632A
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US1658951A
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US1779503A
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US2114446A
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US2118300A
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US2188216A
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US2296322A
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US2324100A
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US2333455A
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US2540298A
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US2427441A
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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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |