US3801370A
Expired / Lapsed
US
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Sink-float liquid contacting of solids
Assignee: EIDP Inc
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Filing: 1971-11-10
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Granted: 1974-04-02
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Expires: 1991-11-10
Abstract
Abstract A method and apparatus for contacting two miscible liquids with solids using the sink-float technique wherein there is obtained substantial transfer of the solids from one of the liquids to the other liquid.
Inventors
- 👤 H Porter
- 👤 F Rennie
- 👤 A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:30
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0215; B01D11/0223; B01D11/0242; B01D11/0246; B01D15/00; B01D15/08; B01D15/10; B01D15/18; B01D15/1892; B01D2011/002; Y; Y10; Y10S; Y10S422/00; Y10S422/901
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |