US2799394A
Expired / Lapsed
US
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Method and apparatus for the separation of solids from liquid-solid mixtures
Assignee: Dorr Oliver Inc
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Filing: 1953-08-19
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Granted: 1957-07-16
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Expires: 1973-08-19
Abstract
No abstract record available.
Inventors
- 👤 Boogaard Matthijs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:02
CPC Classifications
D; D21; D21D; D21D5/00; D21D5/02; B; B01; B01D; B01D29/00; B01D29/11; B01D29/117; B01D29/118; B01D29/88; B01D29/90; B01D29/908
Claims Analysis
Total Claims: 0
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US2661664A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-15 | 1961-01-14 | 1961-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-15 | 1965-01-14 | 1965-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-15 | 1969-01-14 | 1969-07-16 | $7700.00 | Window Closed / Lapsed |