Patent US2528208A successfully refreshed from Google Patents.
US2528208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of smelting metals
Assignee: Individual
•
Filing: 1946-07-12
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Granted: 1950-10-31
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Expires: 1966-07-12
Abstract
No abstract record available.
Inventors
- 👤 Bonsack Walter
- 👤 Walter M Weil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:01
CPC Classifications
C; C22; C22B; C22B21/00; C22B21/0084; C22B9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
THE PROCESS OF SMELTING LIGHT METALS SUCH AS ALUMINUM WHICH COMPRISES MAINTAINING A BODY OF METAL IN MOLTEN CONDITION, CONTINUOUSLY WITHDRAWING MOLTEN METAL FROM SAID BODY, CONTINUOUSLY MIXING WITHDRAWN METAL WITH SOLID METAL PIECES IN A MIXING ZONE TO EFFECT A HEAT TRANSFER THEREBETWEEN, THE WITHDRAWN METAL AND THE SOLID METAL BEING SO PROPORTIONED AS TO CONTINUOUSLY FORM A PASTY MIX FOR SEGREGATION OF IMPURITIES, ADDING FLUXING MATERIALS TO COMMINGLE WITH THE PASTY MIX METAL, CONTINUOUSLY HEATING THE PASTY MIX IN ANOTHER ZONE TO PROGRESSIVELY LIQUEFY THE PASTY MIX SO THAT SEGREGATED IMPURITIES RISE TO THE SURFACE THEREOF, REMOVING THE IMPURITIES, AND CONTINUOUSLY COMMINGLING LIQUEFLED METAL OF THE PASTY MIX WITH THE BODY OF MOLTEN METAL.
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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) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |