Patent US2874038A successfully refreshed from Google Patents.
US2874038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating molten metals
Assignee: Individual
•
Filing: 1956-08-08
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Granted: 1959-02-17
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Expires: 1976-08-08
Abstract
No abstract record available.
Inventors
- 👤 Ruhenbeck Adalbert
- 👤 Mattheis Wilhelm
- 👤 Zirn Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:00
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/072; C22; C22B; C22B9/00; C22B9/05
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF TREATING MOLTEN METALS, COMPRISING THE STEPS OF INTRODUCING INTO A MOLTEN METAL CONTAINING OXIDE SLAG IMPURITIES HYDROGEN WHICH REACTS WITH SAID OXIDE SLAG IMPURITIES TO REDUCD THE SAME, SAID REACTION BEING EXOTHERMIC AND RESULTING IN AN INCREASE IN TEMPERATURE OF SAID MOLTEN METAL; CONTINUING SAID INTRODUCTION OF HYDROGEN INTO SAID MOLTEN METAL UNTIL THE TEMPERATURE OF THE MOLTEN METAL NO LONGER INCREASES, WHEREBY THE AMOUNT OF HYDROGEN INTRODUCED IS JUST SUFFICIENT TO REDUCE ALL OF SAID OXIDE SLAG IMPURITIES; AND RECOVERING A METAL SUBSTANTIALLY FREE OF OXIDE SLAG IMPURITIES.
Claim 2
Independent Claim
92 words
A METHOD OF TREATING MOLTEN METALS, COMPRISING THE STEPS OF INTRODUCING INTO A MOLTEN METAL CONTAINING OXIDE SLAG IMPURITIES HYDROGEN WHICH REACTS WITH SAID OXIDE SLAG IMPURITIES TO REDUCD THE SAME, SAID REACTION BEING EXOTHERMIC AND RESULTING IN AN INCREASE IN TEMPERATURE OF SAID MOLTEN METAL; CONTINUING SAID INTRODUCTION OF HYDROGEN INTO SAID MOLTEN METAL UNTIL THE TEMPERATURE OF THE MOLTEN METAL NO LONGER INCREASES, WHEREBY THE AMOUNT OF HYDROGEN INTRODUCED IS JUST SUFFICIENT TO REDUCE ALL OF SAID OXIDE SLAG IMPURITIES; AND RECOVERING A METAL SUBSTANTIALLY FREE OF OXIDE SLAG IMPURITIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |