Patent US3524743A successfully refreshed from Google Patents.
US3524743A
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US
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Method of processing fly dusts containing sulphur,and smelter mixed oxides or other mixed oxides containing zinc and lead
Assignee: Unterharzer Berg-und Huttenwerke GmbH
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Filing: 1968-01-31
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Granted: 1970-08-18
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Expires: 1988-01-31
Abstract
No abstract record available.
Inventors
- 👤 Hans-Joachim Hellwig
- 👤 Bernhard Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:27
CPC Classifications
C; C22; C22B; C22B7/00; C22B7/02; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 0
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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) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |