US2406820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for removing suspended matter from suspensions
Assignee: Permanente Metals Corp
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Filing: 1943-04-19
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Granted: 1946-09-03
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Expires: 1963-04-19
Abstract
No abstract record available.
Inventors
- 👤 Harmon F Fisher
- 👤 Albert C Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:49
CPC Classifications
B; B01; B01D; B01D57/00; B01D57/02; B01J; B01J8/00; B01J8/005; C; C01; C01F; C01F5/00; C22; C22B; C22B26/00; C22B26/20; C22B26/22; C25; C25B; C25B7/00
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) | 1949-09-02 | 1950-03-04 | 1950-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-09-02 | 1954-03-04 | 1954-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-09-02 | 1958-03-04 | 1958-09-03 | $7700.00 | Window Closed / Lapsed |