Patent US2583668A successfully refreshed from Google Patents.
US2583668A
Expired / Lapsed
US
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Condensation of zinc from its vapor in gaseous mixtures
Assignee: National Smelting Co Ltd
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Filing: 1950-01-14
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Granted: 1952-01-29
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Expires: 1970-01-14
Abstract
No abstract record available.
Inventors
- 👤 Robson Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:20
CPC Classifications
C; C22; C22B; C22B19/00; C22B19/04; C22B19/16; C22B19/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A ROTOR DEVICE FOR SHOWERING MOLTEN METAL IN A ZINC-CONDENSING CHAMBER COMPRISING A DRUM OF REFRACTORY MATERIAL HAVING A VERTICAL AXIS, THE DRUM HAVING AN UPWARD AXIAL EXTENSION OF REFRACTORY MATERIAL OF SMALLER DIAMETER THAN THE DRUM, A VERTICAL DRIVE SHAFT EMBEDDED IN THE DRUM AND ITS EXTENSION AND PASSING THROUGH THE ROOF OF THE CHAMBER, THE DRUM AND ITS EXTENSION PROVIDING A REFRACTORY PROTECTIVE COVERING FOR THAT PORTION OF THE DRIVE SHAFT POSITIONED WITHIN THE CONDENSING CHAMBER, SAID DRUM HAVING ITS OUTER SURFACE RECESSED TO FORM A LEDGE EXTENDING DOWNWARDLY FROM THE TOP AND ROUND THE CIRCUM-
Claim 2
Dependent Claim
98 words
A ROTOR DEVICE FOR SHOWERING MOLTEN METAL IN A ZINC-CONDENSING CHAMBER COMPRISING A DRUM OF REFRACTORY MATERIAL HAVING A VERTICAL AXIS, THE DRUM HAVING AN UPWARD AXIAL EXTENSION OF REFRACTORY MATERIAL OF SMALLER DIAMETER THAN THE DRUM, A VERTICAL DRIVE SHAFT EMBEDDED IN THE DRUM AND ITS EXTENSION AND PASSING THROUGH THE ROOF OF THE CHAMBER, THE DRUM AND ITS EXTENSION PROVIDING A REFRACTORY PROTECTIVE COVERING FOR THAT PORTION OF THE DRIVE SHAFT POSITIONED WITHIN THE CONDENSING CHAMBER, SAID DRUM HAVING ITS OUTER SURFACE RECESSED TO FORM A LEDGE EXTENDING DOWNWARDLY FROM THE TOP AND ROUND THE CIRCUM-
References Cited (Backward Citations)
US2118973A
Cited
US2494552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-28 | 1955-07-30 | 1956-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-28 | 1959-07-30 | 1960-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-28 | 1963-07-30 | 1964-01-29 | $7700.00 | Window Closed / Lapsed |