Patent US2277827A successfully refreshed from Google Patents.
US2277827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of dehydrating magnesium chloride
Assignee: Dow Chemical Co
•
Filing: 1939-05-24
•
Granted: 1942-03-31
•
Expires: 1959-05-24
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Heath
- 👤 Forest R Minger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:44
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/26; C01F5/30; C01F5/34
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) | 1945-03-30 | 1945-09-29 | 1946-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-30 | 1949-09-29 | 1950-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-30 | 1953-09-29 | 1954-03-31 | $7700.00 | Window Closed / Lapsed |