US2614971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydration of alcohols
Assignee: MW Kellogg Co
•
Filing: 1948-04-29
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Granted: 1952-10-21
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Expires: 1968-04-29
Abstract
No abstract record available.
Inventors
- 👤 William P Burton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:22
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/86; C07C29/80; C07C29/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A METHOD FOR DEHYDRATING AN AQUEOUS SOLUTION COMPRISING C3 AND HIGHER ALCOHOLS WHICH COMPRISES CONTACTING SAID AQUEOUS SOLUTION WITH A RELATIVELY WATER-INSOLUBLE ALCOHOL HAVING AT LEAST 4 CARBON ATOMS PER MOLECULE AS A TREATING AGENT, WHOSE WATER-AZEOTROPE WILL FORM TWO PHASE UPON CONDENSATION, IN AN AMOUNT SUFFICIENT TO FORM A LIQUID EXTRACT COMPRISING C3 AND HIGHER ALCOHOLS AND A MINOR PORTION OF WATER PRESENT IN SAID AQUEOUS SOLUTION AND A LIQUID RAFFINATE COMPRISING C3 ALCOHOLS AND A MAJOR PORTION OF WATER PRESENT IN SAID AQUEOUS SOLUTION, DEHYDRATING SAID EXTRACT, AND RECOVERING SUBSTANTIALLY WATER-FREE C3 AND HIGHER ALCOHOLS FROMS SAID DEHYDRATION STEP.
Claim 2
Independent Claim
101 words
A METHOD FOR DEHYDRATING AN AQUEOUS SOLUTION COMPRISING C3 AND HIGHER ALCOHOLS WHICH COMPRISES CONTACTING SAID AQUEOUS SOLUTION WITH A RELATIVELY WATER-INSOLUBLE ALCOHOL HAVING AT LEAST 4 CARBON ATOMS PER MOLECULE AS A TREATING AGENT, WHOSE WATER-AZEOTROPE WILL FORM TWO PHASE UPON CONDENSATION, IN AN AMOUNT SUFFICIENT TO FORM A LIQUID EXTRACT COMPRISING C3 AND HIGHER ALCOHOLS AND A MINOR PORTION OF WATER PRESENT IN SAID AQUEOUS SOLUTION AND A LIQUID RAFFINATE COMPRISING C3 ALCOHOLS AND A MAJOR PORTION OF WATER PRESENT IN SAID AQUEOUS SOLUTION, DEHYDRATING SAID EXTRACT, AND RECOVERING SUBSTANTIALLY WATER-FREE C3 AND HIGHER ALCOHOLS FROMS SAID DEHYDRATION STEP.
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |