US2541841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unidirectional flow in plurality chamber induction furnace
Assignee: Ajax Engineering Corp
•
Filing: 1947-06-20
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Granted: 1951-02-13
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Expires: 1967-06-20
Abstract
No abstract record available.
Inventors
- 👤 Tama Mario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:30
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/16; H05B6/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB142110A
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GB126947A
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US1660407A
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FR788006A
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US2397785A
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US2386369A
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US2339964A
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US2375049A
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US2381523A
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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) | 1954-02-12 | 1954-08-14 | 1955-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-12 | 1958-08-14 | 1959-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-12 | 1962-08-14 | 1963-02-13 | $7700.00 | Window Closed / Lapsed |