US3558481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the separation of liquids
Assignee: Individual
•
Filing: 1969-02-04
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Granted: 1971-01-26
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Expires: 1989-02-04
Abstract
Abstract AN IMPROVED METHOD AND APPARATUS FOR SEPARATING A SOLVENT FROM THE SOLUTION WHICH COMPRISES IMPOSING A TEMPERATURE DIFFERENCE BETWEEN A MORE CONCENTRATED AND LESS CONCENTRATED SOLUTION SEPARATED BY A PERMEABLE MEMBRANE THEREBY CREATING A FREE ENERGY DRIVING FORCE.
Inventors
- 👤 William Thomas Furgerson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:51
CPC Classifications
B; B01; B01D; B01D17/00; B01D17/005; B01D61/00; B01D61/14; B01D61/145
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |