Patent US3057825A successfully refreshed from Google Patents.
US2628984A
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Process for the manufacture of phenols and ketones
Assignee: Hercules Powder Co
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Filing: 1949-09-19
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Granted: 1953-02-17
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Expires: 1969-09-19
Abstract
No abstract record available.
Inventors
- 👤 Aller Basil Vivian
- 👤 Hall Reginald Harold
- 👤 Quin Denis Cheselden
- 👤 Turck Karl Heinrich Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:52
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/53; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A PROCESS FOR THE PRODUCTION OF PHENOL WHICH COMPRISES OXIDISING IN THE LIQUID PHASE ISOPROPYL BENZENE WITH MOLECULAR OXYGEN TO PRODUCE ISOPROPYL BENZENE HYDROPEROXIDE THEREFROM, EFFECTING THE OXIDATION TO SUCH AN EXTENT THAT THE RESULTING REACTING MIXTURE CONTAINS A SUBSTANTIAL AMOUNT OF UNCHARGED ISOPROPYL BENZENE AND THAT ABOUT 10 TO 50% OF THE INITIAL ISOPROPYL BENZENE IS CONVERTED INTO ISOPROPYL BENZENE HYDROPEROXIDE, REACTING AT ELEVATED TEMPERATURES THE RESULTING ISOPROPYL BENZENE HYDROPEROXIDE DISSOLVED IN UNCHANGED ISOPROPYL BEBZENE BY IN TIMATE CONTACT WITH AN ACIDIC HYDROGEN ION EXCHANGE MATERIAL, UNTIL SAID HYDROPEROXIDE IS PRACTICALLY COMPLETELY DECOMPOSED, AND RECOVERING PHENOL AND ACETONE FROM SAID ACID SOLUTION.
References Cited (Backward Citations)
US2484841A
Cited
US2527640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |