US1389546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing water of crystallization from magnesium chlorid
Assignee: Dow Chemical Co
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Filing: 1919-09-24
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Granted: 1921-08-30
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Expires: 1939-09-24
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Dow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:16
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01F5/34
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) | 1924-08-29 | 1925-02-28 | 1925-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1928-08-29 | 1929-02-28 | 1929-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1932-08-29 | 1933-02-28 | 1933-08-30 | $7700.00 | Window Closed / Lapsed |