US1604650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for continuous counter current pressure filtration
Assignee: Individual
•
Filing: 1924-11-03
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Granted: 1926-10-26
•
Expires: 1944-11-03
Abstract
No abstract record available.
Inventors
- 👤 Fred W Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:55
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/50; B01D29/52; B01D29/54; B01D29/44; B01D29/48; B01D29/88; B01D29/90; B01D37/00; B01D37/02
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) | 1929-10-25 | 1930-04-26 | 1930-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-10-25 | 1934-04-26 | 1934-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-10-25 | 1938-04-26 | 1938-10-26 | $7700.00 | Window Closed / Lapsed |