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US2651668A
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Crucible interchanging mechanism for arc melting furnaces
Assignee: Allegheny Ludlum Steel Corp
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Filing: 1952-06-20
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Granted: 1953-09-08
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Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Raymond L Southern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:55
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1295; B; B22; B22D; B22D21/00; B22D21/002; B22D21/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US457879A
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US704993A
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US819883A
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US980345A
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US1866538A
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US2089030A
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US2558744A
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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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |