Patent US3297580A successfully refreshed from Google Patents.
Patent US2756199A successfully refreshed from Google Patents.
US2756199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of alcohol
Assignee: MERCHANTS DISTILLING Corp
•
Filing: 1952-02-28
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Granted: 1956-07-24
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Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert F Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:21
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/001; B01D3/003
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
52 words
THE METHOD OF PURIFYING ETHYL ALCOHOL WHICH COMPRISES THE STEPS OF DISTILLING HIGH WINES CONTAINING SODIUM HYDROXIDE IN CONVENTIONAL PROPORTIONS IN A PLATE COLUMN WHILE CONTINUOUSLY INTRODUCING AMMONIUM HYDROXIDE TO THE STILL NEAR THE BOTTOM OF THE COLUMN AND WITHDRAWING ALCOHOL FROM THE COLUMN NEAR, BUT BELOW, THE TOP OF THE COLUMN.
References Cited (Backward Citations)
US1798713A
Cited
US1933556A
Cited
US1987601A
Cited
US2091030A
Cited
US2139179A
Cited
US2126611A
Cited
US2227485A
Cited
US2207111A
Cited
US2461048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-24 | 1960-01-23 | 1960-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-24 | 1964-01-23 | 1964-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-24 | 1968-01-23 | 1968-07-24 | $7700.00 | Window Closed / Lapsed |