Patent US3215611A successfully refreshed from Google Patents.
US3215611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for deposition of fine grained deposits in the refining and reduction electrolysis of metals
Assignee: Dehydag Deutsche Hydrierwerke GmbH
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Filing: 1963-07-16
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Granted: 1965-11-02
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Expires: 1983-07-16
Abstract
No abstract record available.
Inventors
- 👤 Pawlek Franz
- 👤 Lieber Hans-Wilhelm
- 👤 Strauss Wennemar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:58
CPC Classifications
C; C25; C25C; C25C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN ELECTROREFINING PROCESS FOR METALS WHICH COMPRISES, ELECTROLYTICALLY DISSOLVING THE CRUDE METAL TO BE REFINED AS THE ANODE IN AN ELECTROLYTIC BATH, SAID BATH HAVING ADDITIVE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL STRUCTURAL FORMULA
Claim 2
Dependent Claim
39 words
AN ELECTROREFINING PROCESS FOR METALS WHICH COMPRISES, ELECTROLYTICALLY DISSOLVING THE CRUDE METAL TO BE REFINED AS THE ANODE IN AN ELECTROLYTIC BATH, SAID BATH HAVING ADDITIVE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS HAVING THE GENERAL STRUCTURAL FORMULA
References Cited (Backward Citations)
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US2769775A
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US2892760A
Cited
US2798040A
Cited
US2853444A
Cited
US3101305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-01 | 1969-05-03 | 1969-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-01 | 1973-05-03 | 1973-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-01 | 1977-05-03 | 1977-11-02 | $7700.00 | Window Closed / Lapsed |