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US3495934A
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Method for extracting rhenium from aqueous solutions
Assignee: FORSCH INST fur NE METALLE
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Filing: 1967-02-07
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Granted: 1970-02-17
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Expires: 1987-02-07
Abstract
No abstract record available.
Inventors
- 👤 Siegfried Ziegenbalg
- 👤 Siegfried Gerisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:19
CPC Classifications
C; C01; C01G; C01G47/00; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/28; C22B3/282; C01P; C01P2006/00; C01P2006/80; 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) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |