US2120218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Iodine recovery
Assignee: Dow Chemical Co
•
Filing: 1937-03-12
•
Granted: 1938-06-07
•
Expires: 1957-03-12
Abstract
No abstract record available.
Inventors
- 👤 Sheldon B Heath
- 👤 Frank A Landee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:50
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/13; C01B7/14; Y; Y10; Y10T; Y10T292/00; Y10T292/20
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) | 1941-06-06 | 1941-12-06 | 1942-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-06 | 1945-12-06 | 1946-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-06 | 1949-12-06 | 1950-06-07 | $7700.00 | Window Closed / Lapsed |