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Patent US3627293A successfully refreshed from Google Patents.
US3627293A
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Apparatus for purifying metals by pouring through slag
Assignee: Leybold Heraeus Verwaltung GmbH
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Filing: 1970-01-30
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Granted: 1971-12-14
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Expires: 1990-01-30
Abstract
Abstract Apparatus for the continuous purifying or refining and casting of metals, notably copper, by pouring a metal fused outside the slag layer through the slag layer.
Inventors
- 👤 Franz Sperner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:52
CPC Classifications
C; C22; C22B; C22B9/00; C22B9/10; C22B9/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
12 words
The arrangement as defined in claim 1 wherein said metal is copper.
Claim 2
Dependent Claim
52 words
The arrangement as defined in claim 1 including means for melting said metal exterior to said slag and pouring said molten metal through said slag, a puddle of molten metal forming at the top of said member, said electrode being above said puddle, said bottom wall with perforations dipping into said slag.
Claim 3
Dependent Claim
16 words
The arrangement as defined in claim 1 wherein said electrode is of material of high-electrical resistivity.
Claim 4
Dependent Claim
12 words
The arrangement as defined in claim 4 wherein said material is graphite.
Claim 5
Dependent Claim
17 words
The arrangement as defined in claim 1 including cooling means communicating with said electrode and said slag.
Claim 6
Dependent Claim
17 words
The arrangement as defined in claim 1 including means for moving said member relative to said electrode.
Claim 7
Dependent Claim
34 words
The arrangement as defined in claim 1 including container means for containing said electrode and said slag, said member having a molten metal top and a solid metal bottom, said electrode being of graphite.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |