Patent US2443686A successfully refreshed from Google Patents.
US2443686A
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US
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Mud channel structure for tray type clarifiers
Assignee: Individual
•
Filing: 1946-10-08
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Granted: 1948-06-22
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Expires: 1966-10-08
Abstract
No abstract record available.
Inventors
- 👤 George V Malmgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:22
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/10; B01D21/12; B01D21/14; B01D21/18; B01D21/186; B01D21/24; B01D21/2405; B01D21/2427; B01D21/2433; B01D21/245; B01D2221/00; B01D2221/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |