Patent US3432258A successfully refreshed from Google Patents.
US3432258A
Expired / Lapsed
US
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Selective recovery of salts from mixed salt solutions
Assignee: AMAX MAGNESIUM Corp A CORP OF
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Filing: 1964-10-02
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Granted: 1969-03-11
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Lockwood W Ferris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:49
CPC Classifications
C; C01; C01D; C01D5/00; C01D5/06; C01D5/10; C01F; C01F5/00; C01F5/26; C01F5/30
Claims Analysis
Total Claims: 0
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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) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |