US3108150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-enclosed smelting furnace and method of operating same
Assignee: Elektrokemisk AS
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Filing: 1960-10-11
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Granted: 1963-10-22
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Expires: 1980-10-11
Abstract
No abstract record available.
Inventors
- 👤 Mathias O Sem
- 👤 Haavik Nils Johan
- 👤 Lorck Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:31
CPC Classifications
F; F27; F27D; F27D17/00; F27D17/30; F27D17/304; F27D11/00; F27D11/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF OPERATING A SEMI-ENCLOSED SMELTING FURNACE OF THE TYPE HAVING A POT ADAPTED TO RECEIVE A CHARGE AND AN ELECTRODE ADAPTED TO ENTER AND SMELT SUCH CHARGE WHICH COMPRISES SUSPENDING ABOVE THE CHARGE ONLY A SINGLE HOOD MEMBER WHICH IMMEDIATELY CIRCUMSCRIBES AROUND THE ELECTRODE AND ABOVE THE CHARGE AN OPEN GAS WITHDRAWAL AREA, THE OPEN AREA OF WHICH IS AT LEAST ABOUT 1 1/4 TIMES THE CROSS-SECTIONAL AREA OF THE ELECTRODE BYT LESS THAN THE ENTIRE AREA OF THE CHARGE IN THE FURNACE POT,
Claim 2
Independent Claim
86 words
THE METHOD OF OPERATING A SEMI-ENCLOSED SMELTING FURNACE OF THE TYPE HAVING A POT ADAPTED TO RECEIVE A CHARGE AND AN ELECTRODE ADAPTED TO ENTER AND SMELT SUCH CHARGE WHICH COMPRISES SUSPENDING ABOVE THE CHARGE ONLY A SINGLE HOOD MEMBER WHICH IMMEDIATELY CIRCUMSCRIBES AROUND THE ELECTRODE AND ABOVE THE CHARGE AN OPEN GAS WITHDRAWAL AREA, THE OPEN AREA OF WHICH IS AT LEAST ABOUT 1 1/4 TIMES THE CROSS-SECTIONAL AREA OF THE ELECTRODE BYT LESS THAN THE ENTIRE AREA OF THE CHARGE IN THE FURNACE POT,
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |