US3512928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of magnesium chloride salts for electrolytic magnesium production
Assignee: AMAX MAGNESIUM Corp A CORP OF
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Filing: 1967-06-29
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Granted: 1970-05-19
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Expires: 1987-06-29
Abstract
No abstract record available.
Inventors
- 👤 Leland R Lyons
- 👤 Walter R Mccormick Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:25
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C25; C25C; C25C3/00; C25C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1331688A
Cited
US1798091A
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GB293410A
Cited
US1923594A
Cited
US1933499A
Cited
US3098722A
Cited
US3148950A
Cited
US3218122A
Cited
US3305302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |