US3237930A
Expired / Lapsed
US
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Melting furnace
Assignee: Beteiligungs und Patentverwaltungs GmbH
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Filing: 1964-11-06
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Granted: 1966-03-01
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Expires: 1984-11-06
Abstract
No abstract record available.
Inventors
- 👤 Hofmann Fritz Justus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
F; F27; F27D; F27D11/00; F27D11/08; C; C21; C21C; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; C22; C22B; C22B4/00; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
AN ELECTRIC ARC MELTING AND REFINING FURNACE COMPRISING, IN COMBINATION: (A) A MELTING VESSEL WHICH HAS SEATED AT ITS TOP A COVER HAVING APERTURES; (B) FUEL BURNER MEANS FOR MELTING SOLID METAL CHARGES; (C) ELECTRODE MEANS OPERABLE INDEPENDENTLY OF SAID FUEL BURNER MEANS FOR HEATING THE LIQUID METAL DURING THE REFINING OPERATION; (D) SAID FUEL BURNER MEANS AND SAID ELECTRODE MEANS BEING ALTERNATIVELY INTRODUCEABLE INTO THE INTERIOR OF SAID VESSEL THROUGH THE SAME APERTURES; AND (E) ELECTRIC POWER SUPPLY MEANS FOR SAID ELECTRODE MEANS, SAID POWER SUPPLY MEANS INCORPORATING TRANSFORMER WHICH IS OF SUCH DIMENSIONS THAT IT IS UNSUITED FOR MELTING DOWN THE COLD CHARGE WITHIN THE CUSTOMARY TIME BUT IS SUITED FOR THE POWER CONSUMPTION REQUIRED BY THE ELECTRODE MEANS DURING THE REFINING PERIOD.
Claim 2
Dependent Claim
125 words
AN ELECTRIC ARC MELTING AND REFINING FURNACE COMPRISING, IN COMBINATION: (A) A MELTING VESSEL WHICH HAS SEATED AT ITS TOP A COVER HAVING APERTURES; (B) FUEL BURNER MEANS FOR MELTING SOLID METAL CHARGES; (C) ELECTRODE MEANS OPERABLE INDEPENDENTLY OF SAID FUEL BURNER MEANS FOR HEATING THE LIQUID METAL DURING THE REFINING OPERATION; (D) SAID FUEL BURNER MEANS AND SAID ELECTRODE MEANS BEING ALTERNATIVELY INTRODUCEABLE INTO THE INTERIOR OF SAID VESSEL THROUGH THE SAME APERTURES; AND (E) ELECTRIC POWER SUPPLY MEANS FOR SAID ELECTRODE MEANS, SAID POWER SUPPLY MEANS INCORPORATING TRANSFORMER WHICH IS OF SUCH DIMENSIONS THAT IT IS UNSUITED FOR MELTING DOWN THE COLD CHARGE WITHIN THE CUSTOMARY TIME BUT IS SUITED FOR THE POWER CONSUMPTION REQUIRED BY THE ELECTRODE MEANS DURING THE REFINING PERIOD.
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |