US2193706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating solid materials from a liquid suspension
Assignee: Battelle Memorial Institute Inc
•
Filing: 1937-02-05
•
Granted: 1940-03-12
•
Expires: 1957-02-05
Abstract
No abstract record available.
Inventors
- 👤 John G Attwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:07
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/24; B01D21/2405; B01D21/2411; B01D21/0039; B01D21/0054; B01D21/02; B01D21/2427; B01D21/245; B01D21/2455
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) | 1943-03-12 | 1943-09-11 | 1944-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-03-12 | 1947-09-11 | 1948-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-03-12 | 1951-09-11 | 1952-03-12 | $7700.00 | Window Closed / Lapsed |