Patent US2668047A successfully refreshed from Google Patents.
US2668047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of zinc
Assignee: National Smelting Co Ltd
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Filing: 1950-02-04
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Granted: 1954-02-02
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Expires: 1970-02-04
Abstract
No abstract record available.
Inventors
- 👤 Robson Stanley
- 👤 Derham Leslie Jack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:06
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/04; C22B19/16; C22B19/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
SMELTING APPARATUS INCLUDING, IN COMBINATION WITH MEANS FOR PRODUCING GASES CONTAINING VAPOR OF THE SMELTED METAL AND A SEPARATOR IN WHICH A QUIESCENT BODY OF A MOLTEN SOLUTION OF THE SMELTED METAL IN A SECOND METAL IS ACCUMULATED, A CONDENSER COMPRISING A CLOSED CHAMBER HAVING A GAS-MIXTURE INLET RECEIVING THE VAPORBEARING GASES FROM THE PRODUCING MEANS, A SPENTGAS OUTLET, AN INLET RECEIVING SOLUTION PARTIALLY STRIPPED OF THE SOLUTE METAL FROM THE SEPARATOR, AN INTERNAL TROUGH ELEVATED ABOVE THE LAST-MENTIONED INLET, AN OUTLET COMMUNICATING WITH THE TROUGH AND DELIVERING SOLUTION ENRICHED IN THE SOLUTE FROM THE TROUGH TO THE SEPARATOR, AND MECHANICAL MEANS FOR SHOWERING THE SOLUTION INSIDE THE CHAMBER, WHEREBY THE SOLUTION BECOMES ENRICHED IN THE SOLUTE METAL BY CONDENSATION AND SOLUTION FROM THE VAPOR CONTAINED IN THE GASES AND FOR RAISING SOME OF THE ENRICHED SOLUTION INTO THE TROUGH.
Claim 2
Dependent Claim
140 words
SMELTING APPARATUS INCLUDING, IN COMBINATION WITH MEANS FOR PRODUCING GASES CONTAINING VAPOR OF THE SMELTED METAL AND A SEPARATOR IN WHICH A QUIESCENT BODY OF A MOLTEN SOLUTION OF THE SMELTED METAL IN A SECOND METAL IS ACCUMULATED, A CONDENSER COMPRISING A CLOSED CHAMBER HAVING A GAS-MIXTURE INLET RECEIVING THE VAPORBEARING GASES FROM THE PRODUCING MEANS, A SPENTGAS OUTLET, AN INLET RECEIVING SOLUTION PARTIALLY STRIPPED OF THE SOLUTE METAL FROM THE SEPARATOR, AN INTERNAL TROUGH ELEVATED ABOVE THE LAST-MENTIONED INLET, AN OUTLET COMMUNICATING WITH THE TROUGH AND DELIVERING SOLUTION ENRICHED IN THE SOLUTE FROM THE TROUGH TO THE SEPARATOR, AND MECHANICAL MEANS FOR SHOWERING THE SOLUTION INSIDE THE CHAMBER, WHEREBY THE SOLUTION BECOMES ENRICHED IN THE SOLUTE METAL BY CONDENSATION AND SOLUTION FROM THE VAPOR CONTAINED IN THE GASES AND FOR RAISING SOME OF THE ENRICHED SOLUTION INTO THE TROUGH.
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) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |