Patent US2812866A successfully refreshed from Google Patents.
US2812866A
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Method and apparatus for charging furnaces
Assignee: Republic Steel Corp
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Filing: 1951-07-17
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Granted: 1957-11-12
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Expires: 1971-07-17
Abstract
No abstract record available.
Inventors
- 👤 Zebulon W Whitehouse
- 👤 Oscar M Schulze
- 👤 Hans F Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:37
CPC Classifications
F; F27; F27D; F27D3/00; F27D3/06; C; C21; C21C; C21C5/00; C21C5/52; C21C5/527; F27D3/0025; F27D3/003; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US716750A
Cited
US775211A
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US864934A
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FR431250A
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US1079126A
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US2405342A
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US2576974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |