US3785969A
Expired / Lapsed
US
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Method of and apparatus for the continuous concentration of a dispersion containing suspended solid material
Assignee: Bayer AG
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Filing: 1971-04-22
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Granted: 1974-01-15
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Expires: 1991-04-22
Abstract
Abstract SUSPENDED SOLID DISPERSIONS ARE GUIDED UNDER A PRESSURE OF 0.2 TO 20 ATM. ABOVE ATMOSPHERIC THROUGH A GAP WHICH IS A PERFORATION, THE SOLID DISPERSION, AS VIEWED IN DIRECTION PERPENDICULAR TO SAID SHELLS, BEING SUBJECTED TO A DROP IN VELOCITY. THE SUPPLY TAKES PLACE CENTRALLY AND THE FILTER CAKE IS REMOVED PERIPHERALLY.
Inventors
- 👤 H Moells
- 👤 R Hoernle
- 👤 M Buecheler
- 👤 H Raab
- 👤 J Adrio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:16
CPC Classifications
B; B01; B01D; B01D33/00; B01D33/01; B01D33/03; B01D33/0307; B01D33/033; B01D33/0338; B01D29/00; B01D29/11; B01D29/31; B01D29/35; B01D29/356; B01D29/62; B01D29/70; B01D29/72; B01D29/76; B01D29/80; B01D29/84; B01D29/846; B01D29/86; B01D29/88; B01D29/90; B01D29/902; B01D33/44; B01D33/52; B01D33/54; B01D33/58; B01D33/62; B01D33/66; B01D33/666; B01D33/68; B01D33/70; B01D33/72; B01D33/722; B01D35/00; B01D35/16; B01D35/18; B01D35/20; B01D2201/00; B01D2201/02
Claims Analysis
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References Cited (Backward Citations)
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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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |