US3834895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reclaiming iron from ferrous dust
Assignee: Park Ohio Holdings Corp
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Filing: 1973-04-11
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Granted: 1974-09-10
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Expires: 1993-04-11
Abstract
Abstract IRON BEARING PARTICULATE WASTE MATERIAL IS INTRODUCED INTO A PLASMA-ARC FURNACE AND HEATED IN THE FURNACE TO SEPARATE THE IRON FROM THE PARTICULATE MATERIAL AND TO MELT THE IRON. THE MOLTEN IRON IS COLLECTED IN A TROUGH IN THE BOTTOM OF THE PLASMA-ARC FURNACE AND IS DISCHARGED FROM THE FURNACE DIRECTLY INTO AN INGOT MOLD OR STEEL MAKING FURNACE.
Inventors
- 👤 J Cachat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:01
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/12; C21B13/125; C21C; C21C5/00; C21C5/52; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/20
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |