US2676010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the melt-recovery of zinc
Assignee: UNTERHARZER BERG und HUETTENWE
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Filing: 1951-05-29
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Granted: 1954-04-20
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Matthies Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:42
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/04; C22B19/16; C22B19/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A FURNACE FOR THE MELT-RECOVERY OF ZINC FROM INTERMEDIARY AND WASTE PRODUCTS AT A TEMPERATURE WHICH LIES SUBSTANTIALLY ABOVE THE MELTING POINT OF ZINC AND PARTICULARLY AT A TEMPERATURE OF ABOUT 700 TO 800* C. COMPRISING A ROTATABLE DRUM FURNACE, OF WHICH THE LENGTH IS GREATER THAN ITS DIAMETER, LATERAL END WALLS TO CLOSE THE FURNACE, A VERTICAL WALL SUBSTANTIALLY IN THE CENTER PLANE OF SAID DRUM AND CONSISTING OF A HEAT CONDUCTIVE REFRACTORY MATERIAL TO SEPARATE THE INNER SPACE OF THE DRUM INTO TWO ADJACENT CHAMBERS, MEANS FOR FEEDING THE ZINC CONTAINING PRODUCTS INTO THE FIRST OF SAID TWO CHAMBERS, CIRCUMFERENTIAL OPENINGS IN SAID CENTER PLANE WALL FOR THE TRANSPORT OF THE CHARGE FROM THE FIRST INTO THE SECOND CHAMBER, A BURNER AND A GAS DISCHARGE TUBE LOCATED IN THE LATERAL END WALL OF SAID SECOND CHAMBER TO PROVIDE A DIRECT HEATING FOR SAID SECOND CHAMBER AND AN INDIRECT HEATING FOR SAID FIRST CHAMBER.
Claim 2
Dependent Claim
155 words
A FURNACE FOR THE MELT-RECOVERY OF ZINC FROM INTERMEDIARY AND WASTE PRODUCTS AT A TEMPERATURE WHICH LIES SUBSTANTIALLY ABOVE THE MELTING POINT OF ZINC AND PARTICULARLY AT A TEMPERATURE OF ABOUT 700 TO 800* C. COMPRISING A ROTATABLE DRUM FURNACE, OF WHICH THE LENGTH IS GREATER THAN ITS DIAMETER, LATERAL END WALLS TO CLOSE THE FURNACE, A VERTICAL WALL SUBSTANTIALLY IN THE CENTER PLANE OF SAID DRUM AND CONSISTING OF A HEAT CONDUCTIVE REFRACTORY MATERIAL TO SEPARATE THE INNER SPACE OF THE DRUM INTO TWO ADJACENT CHAMBERS, MEANS FOR FEEDING THE ZINC CONTAINING PRODUCTS INTO THE FIRST OF SAID TWO CHAMBERS, CIRCUMFERENTIAL OPENINGS IN SAID CENTER PLANE WALL FOR THE TRANSPORT OF THE CHARGE FROM THE FIRST INTO THE SECOND CHAMBER, A BURNER AND A GAS DISCHARGE TUBE LOCATED IN THE LATERAL END WALL OF SAID SECOND CHAMBER TO PROVIDE A DIRECT HEATING FOR SAID SECOND CHAMBER AND AN INDIRECT HEATING FOR SAID FIRST CHAMBER.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |