Patent US2727074A successfully refreshed from Google Patents.
US2727074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol
Assignee: —
•
Filing: —
•
Granted: 1955-12-13
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Expires: 1972-12-13
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:55
CPC Classifications
C; C07; C07C; C07C39/00; C07C39/02; C07C39/04; C07C37/00; C07C37/08; C07C407/00; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C45/00; C07C45/51; C07C45/53; C07C49/00; C07C49/04; C07C49/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
IN THE PROCESS FOR THE MANUFCTURE OF PHENOL BY THE CATALYST DECOMPOSITION OF ISOPROPYLBENZENE HYDROPEROIXIDE THE STEPS OF SEPARATING PHENOL FROM ACETOPHENONE WHICH COMPRISES EXTRACTING A MIXTURE CONTAINING PHENOL AND ACETOPHENONE WITH AN AQUEOUS SODIUM HYDROXIDE SOLUTION WHICH CONTAINS LESS THAN 15 GRAMS PER SODIUM HYDROXIDE IN 100 CC., THEREBY FORMING AN AQUEOUS ALKALINE PHASE CONTAINING SODIUM PHENATE AND A RESIDUAL PHASE CONTAINING ACETOPHENONE, SEPARATING THE AQUEOUS PHASE AND RECOVERING PHENOL FROM THE SODIUM PHENATE IN SOLUTION IN THE AQUEOUS PHASE BY TREATMENT WITH ACID, AND RECOVERING SUBSTANTIALLY PURE ACETOPHENONE FROM THE RESIDUAL PHASE BY DISTILLATION.
Claim 2
Dependent Claim
96 words
IN THE PROCESS FOR THE MANUFCTURE OF PHENOL BY THE CATALYST DECOMPOSITION OF ISOPROPYLBENZENE HYDROPEROIXIDE THE STEPS OF SEPARATING PHENOL FROM ACETOPHENONE WHICH COMPRISES EXTRACTING A MIXTURE CONTAINING PHENOL AND ACETOPHENONE WITH AN AQUEOUS SODIUM HYDROXIDE SOLUTION WHICH CONTAINS LESS THAN 15 GRAMS PER SODIUM HYDROXIDE IN 100 CC., THEREBY FORMING AN AQUEOUS ALKALINE PHASE CONTAINING SODIUM PHENATE AND A RESIDUAL PHASE CONTAINING ACETOPHENONE, SEPARATING THE AQUEOUS PHASE AND RECOVERING PHENOL FROM THE SODIUM PHENATE IN SOLUTION IN THE AQUEOUS PHASE BY TREATMENT WITH ACID, AND RECOVERING SUBSTANTIALLY PURE ACETOPHENONE FROM THE RESIDUAL PHASE BY DISTILLATION.
References Cited (Backward Citations)
GB670444A
Cited
US2597497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |