Patent US2445457A successfully refreshed from Google Patents.
US2445457A
Expired / Lapsed
US
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Pot furnace
Assignee: Westinghouse Electric Corp
•
Filing: 1945-04-21
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Granted: 1948-07-20
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Expires: 1965-04-21
Abstract
No abstract record available.
Inventors
- 👤 Roth Willard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:04
CPC Classifications
F; F27; F27B; F27B14/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1705714A
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US1854374A
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US1845497A
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US2247826A
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US2260961A
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US2404060A
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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) | 1951-07-20 | 1952-01-19 | 1952-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-20 | 1956-01-19 | 1956-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-20 | 1960-01-19 | 1960-07-20 | $7700.00 | Window Closed / Lapsed |