Patent US2670324A successfully refreshed from Google Patents.
US2670324A
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Extractive distillation process
Assignee: Stanolind Oil and Gas Co
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Filing: 1949-10-28
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Granted: 1954-02-23
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Expires: 1969-10-28
Abstract
No abstract record available.
Inventors
- 👤 Grekel Howard
- 👤 Benjamin S Pace
- 👤 John D Ireland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:39
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
69 words
IN A PROCESS FOR EFFECTING SEPARATION OF METHYL ETHYL KETONE FROM AN AQUEOUS MIXTURE OF ETHANOL BY MEANS OF EXTRACTIVE DISTILLATION OF WATER IN A COLUMN HAVING A STRIPPING AND A WASHING SECTION THEREIN WHEREBY THE RELATIVE VOLATILITIES OF THE AFORESAID KETONE AND ALCOHOL ARE MODIFIED, THE IMPROVEMENT WHICH COMPRISES INDEPENDENTLY ADJUSTING THE LIQUID TO VAPOR RATIOS OF THE AFORESAID COMPOUNDS WITHIN SAID SECTIONS AND INCREASING THE RELATIVE VOLATILITIES
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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |