US3104939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preventing short-circuiting by an electrode in an electric arc furnace having a liquid melt therein
Assignee: Elektroschmelzwerk Kempten GmbH
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Filing: 1960-06-20
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Granted: 1963-09-24
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Expires: 1980-06-20
Abstract
No abstract record available.
Inventors
- 👤 Vogt Adolf
- 👤 Wiebke Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:55
CPC Classifications
H; H05; H05B; H05B7/00; H05B7/02; C; C22; C22B; C22B4/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A PROCESS FOR PREVENTING SHORT-CIRCUITING WHEN ONE IOR MORE ELECTRODES APPROACH THE LAYER OF A LIQUID MELT FORMED IN AN ELECTRIC-ARC-TYPE FURNACE UNDER REACTION CONDITIONS IN WHICH THE VAPOR PHASE OF THE PRODUCT FORMED IN THE SAID ELECTRIC ARC HAS LOW ELECTRIC CONDUCTIVITY, THE STEP WHICH CONSISTS IN FEEDING INTO SAID ELECTRTRIC ARC-TYPE FURNACE UNDER CONDITIONS A REACTION MIXTURE IN LUMP FORM OF A SIZE BETWEEN ABOUT 10 AND 300 MM. CONTAINING 0.01 TO 1.2% BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF INORGANIC ALKALI METAL COMPOUNDS, INORGANIC ALKALINE EARTH METAL COMPOUNDS, AND INORGANIC MAGNESIUM COMPOUNDS.
Claim 2
Dependent Claim
100 words
IN A PROCESS FOR PREVENTING SHORT-CIRCUITING WHEN ONE IOR MORE ELECTRODES APPROACH THE LAYER OF A LIQUID MELT FORMED IN AN ELECTRIC-ARC-TYPE FURNACE UNDER REACTION CONDITIONS IN WHICH THE VAPOR PHASE OF THE PRODUCT FORMED IN THE SAID ELECTRIC ARC HAS LOW ELECTRIC CONDUCTIVITY, THE STEP WHICH CONSISTS IN FEEDING INTO SAID ELECTRTRIC ARC-TYPE FURNACE UNDER CONDITIONS A REACTION MIXTURE IN LUMP FORM OF A SIZE BETWEEN ABOUT 10 AND 300 MM. CONTAINING 0.01 TO 1.2% BY WEIGHT OF A MATERIAL SELECTED FROM THE GROUP CONSISTING OF INORGANIC ALKALI METAL COMPOUNDS, INORGANIC ALKALINE EARTH METAL COMPOUNDS, AND INORGANIC MAGNESIUM COMPOUNDS.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-23 | 1967-03-25 | 1967-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-23 | 1971-03-25 | 1971-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-23 | 1975-03-25 | 1975-09-24 | $7700.00 | Window Closed / Lapsed |