Patent US2382409A successfully refreshed from Google Patents.
US2382409A
Expired / Lapsed
US
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Thickener apparatus
Assignee: Mining Process and Patent Co
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Filing: 1942-09-28
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Granted: 1945-08-14
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Expires: 1962-09-28
Abstract
No abstract record available.
Inventors
- 👤 John H V Finney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:09
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/0096; B01D21/02; B01D21/04; B01D21/06; B01D21/18; B01D21/24; B01D21/2405; B01D21/2427; B01D2221/00; B01D2221/04
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) | 1948-08-13 | 1949-02-12 | 1949-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-08-13 | 1953-02-12 | 1953-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-08-13 | 1957-02-12 | 1957-08-14 | $7700.00 | Window Closed / Lapsed |