Patent US2395221A successfully refreshed from Google Patents.
US2395221A
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Process for purifying metal halide solutions
Assignee: Mathieson Alkali Works Inc
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Filing: 1943-02-12
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Granted: 1946-02-19
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Expires: 1963-02-12
Abstract
No abstract record available.
Inventors
- 👤 Clifford A Hampel
- 👤 John E Weiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:05
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01D; C01D3/00; C01D3/14; C01D3/16; C01F11/00; C01F11/20
Claims Analysis
Total Claims: 0
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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) | 1949-02-18 | 1949-08-20 | 1950-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-02-18 | 1953-08-20 | 1954-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-02-18 | 1957-08-20 | 1958-02-19 | $7700.00 | Window Closed / Lapsed |