Patent US2471259A successfully refreshed from Google Patents.
US2471259A
Expired / Lapsed
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Electrically actuated heater
Assignee: ELI F MANGOLD
•
Filing: 1944-06-07
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Granted: 1949-05-24
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Expires: 1964-06-07
Abstract
No abstract record available.
Inventors
- 👤 Harold P Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:35
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1714578A
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US1673140A
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US1690898A
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US1930551A
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US1994909A
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US2044573A
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US2134675A
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US2350941A
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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) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |