Patent US5269753A successfully refreshed from Google Patents.
Patent US2708351A successfully refreshed from Google Patents.
Patent US2409861A successfully refreshed from Google Patents.
US2409861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and agents for the recovery of magnesium ions from brine
Assignee: Dow Chemical Co
•
Filing: 1942-02-02
•
Granted: 1946-10-22
•
Expires: 1962-02-02
Abstract
No abstract record available.
Inventors
- 👤 Melvin J Hunter
- 👤 William C Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
C; C01; C01F; C01F5/00; B; B01; B01J; B01J39/00; B01J39/04; B01J39/07
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1949-10-21 | 1950-04-22 | 1950-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-10-21 | 1954-04-22 | 1954-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-10-21 | 1958-04-22 | 1958-10-22 | $7700.00 | Window Closed / Lapsed |