US3214349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering pure solvent by film distillation
Assignee: SALINE WATER CONVERSION Corp
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Filing: 1962-12-06
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Granted: 1965-10-26
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Expires: 1982-12-06
Abstract
No abstract record available.
Inventors
- 👤 Edward C Kehoe
- 👤 Elwood C Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:14
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/06; C02F1/08; Y; Y10; Y10S; Y10S159/00; Y10S159/29; Y10S203/00; Y10S203/11; Y10S203/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD FOR CONTINUOUSLY RECOVERING SUBSTANTIALLY PURE SOLVENT FROM A LIQUID SOLVENT SYSTEM CONTAINING A DISSOLVED NON-VOLATILE SUBSTANCE, WHICH COMPRISES HEATING THE LIQUID, SO FLOWING THE HEATED LIQUID DOWNWARDLY THROUGH A PACKED COLUMN AS TO DISPOSE THE SAME IN THIN FILM ATTITUDE OVER THE SURFACE OF THE PACKING, MAINTAINING AS ABSOLUTE PRESSURE IN THE FREE SPACE OF THE PACKING SUBSTANTIALLY EQUAL TO THE SATURATION PRESSURE OF THE SOLVENT IN THE FILM AT ANY POINT THEREOF, THUS TO INDUCE DIFFUSION VAPORIZATION OF A PORTION OF THE SOLVENT FROM THE FLOWING FILM, WITHDRAWING SOLVENT VAPOR FROM THE COLUMN ADJACENT THE FOOT THEREOF AND CONDENSING THE SO WITHDRAWN VAPOR.
Claim 2
Independent Claim
106 words
A METHOD FOR CONTINUOUSLY RECOVERING SUBSTANTIALLY PURE SOLVENT FROM A LIQUID SOLVENT SYSTEM CONTAINING A DISSOLVED NON-VOLATILE SUBSTANCE, WHICH COMPRISES HEATING THE LIQUID, SO FLOWING THE HEATED LIQUID DOWNWARDLY THROUGH A PACKED COLUMN AS TO DISPOSE THE SAME IN THIN FILM ATTITUDE OVER THE SURFACE OF THE PACKING, MAINTAINING AS ABSOLUTE PRESSURE IN THE FREE SPACE OF THE PACKING SUBSTANTIALLY EQUAL TO THE SATURATION PRESSURE OF THE SOLVENT IN THE FILM AT ANY POINT THEREOF, THUS TO INDUCE DIFFUSION VAPORIZATION OF A PORTION OF THE SOLVENT FROM THE FLOWING FILM, WITHDRAWING SOLVENT VAPOR FROM THE COLUMN ADJACENT THE FOOT THEREOF AND CONDENSING THE SO WITHDRAWN VAPOR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |