Patent US2759794A successfully refreshed from Google Patents.
US2759794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of magnesium chloride solutions
Assignee: International Minerals and Chemical Corp
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Filing: 1951-07-26
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Granted: 1956-08-21
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Expires: 1971-07-26
Abstract
No abstract record available.
Inventors
- 👤 Charles H Fuchsman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:02
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
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
Claim 2
Dependent Claim
145 words
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
References Cited (Backward Citations)
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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) | 1959-08-21 | 1960-02-20 | 1960-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-21 | 1964-02-20 | 1964-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-21 | 1968-02-20 | 1968-08-21 | $7700.00 | Window Closed / Lapsed |