US2761818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ethanolamines
Assignee: Tidewater Oil Co
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Filing: 1952-09-24
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Granted: 1956-09-04
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Expires: 1972-09-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Draemel
- 👤 Lionel S Galstaun
- 👤 Harry G Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:45
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
A PROCESS OF RECOVERING SUBSTANTIALLY SALT-FREE ETHANOLAMINE FROM AN AQUEOUS ETHANOLAMINE SOLUTION CONTAMINATED WITH DISSOVLED SALTS WHICH COMPRISES: MIXING SUCH SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ALIPHATIC ALCOHOL CONTAINING FROM 5 TO 8 CARBON ATOMS THEREBY FORMING AN ALCOHOL PHASE ENRICHED IN ETHANOLAMINE CONTENT AND AN AQUEOUS PHASE CONTAINING SAID SALTS IN SOLUTION, SEPARATING FROM THE RESULTING MIXTURE ALCOHOL ENRICHED IN ETHANOLAMINE CONTENT, THEN RECOVERING ETHANOLAMINE FROM SAID ENRICHED ALSOHOL.
Claim 2
Dependent Claim
69 words
A PROCESS OF RECOVERING SUBSTANTIALLY SALT-FREE ETHANOLAMINE FROM AN AQUEOUS ETHANOLAMINE SOLUTION CONTAMINATED WITH DISSOVLED SALTS WHICH COMPRISES: MIXING SUCH SOLUTION WITH A SUBSTANTIALLY WATER-IMMISCIBLE ALIPHATIC ALCOHOL CONTAINING FROM 5 TO 8 CARBON ATOMS THEREBY FORMING AN ALCOHOL PHASE ENRICHED IN ETHANOLAMINE CONTENT AND AN AQUEOUS PHASE CONTAINING SAID SALTS IN SOLUTION, SEPARATING FROM THE RESULTING MIXTURE ALCOHOL ENRICHED IN ETHANOLAMINE CONTENT, THEN RECOVERING ETHANOLAMINE FROM SAID ENRICHED ALSOHOL.
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) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |