US2797994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for treatment of iron materials in a liquid state
Assignee: Gutehoffnungshutte Oberhausen AG
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Filing: 1953-02-10
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Granted: 1957-07-02
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Expires: 1973-02-10
Abstract
No abstract record available.
Inventors
- 👤 Kopke Gunter
- 👤 Fuchs Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:22
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; B; B22; B22D; B22D1/00; B22D1/002; B22D1/005; F; F27; F27D; F27D3/00; F27D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METHOD OF PRODUCING CAST IRON CONTAINING GRAPHITE IN SPHERULITIC FORM COMPRISING INTRODUCING A REACTION MATERIAL HAVING AT LEAST 40% MAGNESIUM CONTENT INTO A MELT OF CAST IRON FROM THE BOTTOM THEREOF IN SMALL QUANTITIES CONTROLLED IN ACCORDANCE WITH THE DESIRED CHARACTERISTICS OF THE IRON TO BE PRODUCED WHILE PREVENTING A REACTION OF EXPLOSIVE VIOLENCE UPON INTRODUCING THE REACTION MATERIAL BY DRIVING THE REACTION MATERIAL INTO THE MELT UNDER PRESSURE AND IN LIQUID CONDITION WITH A GASEOUS MEDIUM AND INTERPOSING A PROTECTIVE BODY BETWEEN THE MEDIUM AND THE MATERIAL.
Claim 2
Independent Claim
89 words
A METHOD OF PRODUCING CAST IRON CONTAINING GRAPHITE IN SPHERULITIC FORM COMPRISING INTRODUCING A REACTION MATERIAL HAVING AT LEAST 40% MAGNESIUM CONTENT INTO A MELT OF CAST IRON FROM THE BOTTOM THEREOF IN SMALL QUANTITIES CONTROLLED IN ACCORDANCE WITH THE DESIRED CHARACTERISTICS OF THE IRON TO BE PRODUCED WHILE PREVENTING A REACTION OF EXPLOSIVE VIOLENCE UPON INTRODUCING THE REACTION MATERIAL BY DRIVING THE REACTION MATERIAL INTO THE MELT UNDER PRESSURE AND IN LIQUID CONDITION WITH A GASEOUS MEDIUM AND INTERPOSING A PROTECTIVE BODY BETWEEN THE MEDIUM AND THE MATERIAL.
References Cited (Backward Citations)
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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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |