US2378952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Countercurrent contacting apparatus
Assignee: E B Badger & Sons Co
•
Filing: 1942-05-27
•
Granted: 1945-06-26
•
Expires: 1962-05-27
Abstract
No abstract record available.
Inventors
- 👤 William C Rousseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:49
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0426; B01D11/043; B01D3/00; B01D3/14; B01D3/16; B01D3/18; B01D3/20; B01D3/205
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) | 1948-06-25 | 1948-12-25 | 1949-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-06-25 | 1952-12-25 | 1953-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-06-25 | 1956-12-25 | 1957-06-26 | $7700.00 | Window Closed / Lapsed |