Patent US2744144A successfully refreshed from Google Patents.
US2744144A
Expired / Lapsed
US
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Purification of phenol
Assignee: —
•
Filing: —
•
Granted: 1956-05-01
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Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:55
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08; C07C39/00; C07C39/02; C07C39/04; C07C37/68; C07C37/685; C07C37/86; C07C407/00; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/10; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE METHOD OF PURIFYING PHENOL OBTAINED IN THE PROCESS OF OXIDATION OF AN ALKYL BENZENE CONSISTING ESSENTIALLY OF CUMENE AND CLEAVAGE OF THE RESULTING HYDROPEROXIDE, AND CONTAINING A GENETIC IMPURITY OF THE GROUP CONSISTING OF A-METHYLSTYRENE AND MESITYL OXIDE WHICH COM PRISES CONTACTING SAID IMPURE PHENOL IN THE LIQUID PHASE WITH A HEXANE BOILING IN THE RANGE OF ABOUT 62* C. TO ABOUT 67* C., ALLOWING THE RESULTING MIXTURE TO SEPARATE INTO A PHENOL PHASE AND A HEXANE, PHASE AND SEPARATING THE PHENOL PHASE FROM THE HEXANE PHASE.
Claim 2
Independent Claim
88 words
THE METHOD OF PURIFYING PHENOL OBTAINED IN THE PROCESS OF OXIDATION OF AN ALKYL BENZENE CONSISTING ESSENTIALLY OF CUMENE AND CLEAVAGE OF THE RESULTING HYDROPEROXIDE, AND CONTAINING A GENETIC IMPURITY OF THE GROUP CONSISTING OF A-METHYLSTYRENE AND MESITYL OXIDE WHICH COM PRISES CONTACTING SAID IMPURE PHENOL IN THE LIQUID PHASE WITH A HEXANE BOILING IN THE RANGE OF ABOUT 62* C. TO ABOUT 67* C., ALLOWING THE RESULTING MIXTURE TO SEPARATE INTO A PHENOL PHASE AND A HEXANE, PHASE AND SEPARATING THE PHENOL PHASE FROM THE HEXANE PHASE.
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) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |