US1845129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor column having alpha liquid level regulator
Assignee: Individual
•
Filing: 1927-07-12
•
Granted: 1932-02-16
•
Expires: 1947-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jesse M Coahran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:21
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0484; B01D11/0426; B01D11/0434
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) | 1935-02-15 | 1935-08-17 | 1936-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-02-15 | 1939-08-17 | 1940-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-02-15 | 1943-08-17 | 1944-02-16 | $7700.00 | Window Closed / Lapsed |