Patent US3290031A successfully refreshed from Google Patents.
US3290031A
Expired / Lapsed
US
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Smelting-furnace, particularly for the production of steel
Assignee: Beteiligungs und Patentverwaltungs GmbH
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Filing: 1963-07-16
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Granted: 1966-12-06
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Expires: 1983-07-16
Abstract
No abstract record available.
Inventors
- 👤 Maatsch Jurgen
- 👤 Borowski Kurt
- 👤 Hofmann Fritz Justus
- 👤 Hess Walter
- 👤 Sixel Gustav-Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:31
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/52; C21C5/5252; F; F27; F27D; F27D17/00; F27D17/30; F27D17/304
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A SMELTING FURNACE, PARTICULARLY FOR THE PRODUCTION OF STEEL, COMPRISING A FURNACE VESSEL, AN ARCH HAVING AN OPENING SUPPORTED BY SAID FURNACE VESSEL, SAID OPENING IN SAID ARCH BEING ADAPTED TO DISCHARGE GASES FROM SAID FURNACE VESSEL, BURNER MEANS DISPOSED IN THE UPPER PORTION OF SAID FURNACE VESSEL FOR HEATING THE LATTER, A FLUE MOVABLY DIDPOSED ON TOP OF SAID ARCH, SAID BURNER COMPRISING FUEL BURNERS AND ELECTRODE BURNERS, THE LATTER INCLUDING A TRANSFORMER, TO BE USED SELECTIVELY AND EXCHANGEABLY, AND SAID ELECTRODE BURNERS EXTENDING THROUGH SAID OPENING IN SAID ARCH.
Claim 2
Dependent Claim
91 words
A SMELTING FURNACE, PARTICULARLY FOR THE PRODUCTION OF STEEL, COMPRISING A FURNACE VESSEL, AN ARCH HAVING AN OPENING SUPPORTED BY SAID FURNACE VESSEL, SAID OPENING IN SAID ARCH BEING ADAPTED TO DISCHARGE GASES FROM SAID FURNACE VESSEL, BURNER MEANS DISPOSED IN THE UPPER PORTION OF SAID FURNACE VESSEL FOR HEATING THE LATTER, A FLUE MOVABLY DIDPOSED ON TOP OF SAID ARCH, SAID BURNER COMPRISING FUEL BURNERS AND ELECTRODE BURNERS, THE LATTER INCLUDING A TRANSFORMER, TO BE USED SELECTIVELY AND EXCHANGEABLY, AND SAID ELECTRODE BURNERS EXTENDING THROUGH SAID OPENING IN SAID ARCH.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |