US3664826A
Expired / Lapsed
US
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Process for accelerating metallurgical reactions
Assignee: Rheinstahl Huettenwerke AG
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Filing: 1969-03-17
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Granted: 1972-05-23
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Expires: 1989-03-17
Abstract
Abstract APPARATUS INCLUDING MEANS FOR ADJUSTING VERTICALLY THE LEVEL OF A MECHANICAL STIRRING MEMBER WITH RESPECT TO THE VERTICAL LEVEL OF A MELT, E.G. THE VERTICAL LEVEL OF THE INTERFACE BETWEEN THE TOP SURFACE OF AN IRON MELT SURFACE ESPECIALLY IN A CIRCULAR UPRIGHT LADLE WITH A DISCHARGE APER- TURE, AND METHOD OF USING SUCH STIRRING MEMBER, E.G. TO ENHANCE OR ACCELERATE CONTACT AND REACTION BETWEEN SUCH MELT AND FLOATING INGREDIENTS, TO CARRY OUT METALLURGICAL REACTIONS, AS WELL AS TOUGH CAST IRON CONTAINING SPHERICAL GRAPHITE PRODUCIBLE THEREBY.
Inventors
- 👤 Friedrich Kraemer
- 👤 Jorn Mandel
- 👤 Siegfried Mayer
- 👤 Klaus Rohrig
- 👤 Hans-Peter Schulz
- 👤 Hilmar Weidenmuller
- 👤 Klaus Dieter Haverkamp
- 👤 Jurgen Motz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
F; F27; F27D; F27D27/00; C; C21; C21C; C21C1/00
Claims Analysis
Total Claims: 0
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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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |