Patent US1864237A successfully refreshed from Google Patents.
US1864237A
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Extracting and filtering apparatus
Assignee: Individual
•
Filing: 1931-10-30
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Granted: 1932-06-21
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Expires: 1951-10-30
Abstract
No abstract record available.
Inventors
- 👤 Fauth Philipp Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/18; B01D29/00; B01D29/39; B01D29/76; B01D29/86; B01D37/00
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) | 1935-06-21 | 1935-12-21 | 1936-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-06-21 | 1939-12-21 | 1940-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-06-21 | 1943-12-21 | 1944-06-21 | $7700.00 | Window Closed / Lapsed |