Patent US2663735A successfully refreshed from Google Patents.
US2663735A
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Process for production of phenol and ketones by decomposition of hydroperoxides
Assignee: Hercules Powder Co
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Filing: 1949-12-30
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Granted: 1953-12-22
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Expires: 1969-12-30
Abstract
No abstract record available.
Inventors
- 👤 Leo J Filar
- 👤 Milton A Taves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:49
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/51; C07C45/53; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE PROCESS OF PRODUCING A PHENOL AND AN ALIPHATIC KETONE BY DECOMPOSITION OF AN A,A-DIALKYLARYLMETHYL HYDROPEROXIDE WHICH COMPRISES ADDING SAID HYDROPEROXIDE TO A HOMOGENEOUS REACTION MEDIUM COMPRISING ACETONE AND CONCENTRATED SULFURIC ACID, THE CONCENTRATION OF SAID ACID IN SAID MEDIUM BEING BETWEEN ABOUYT 0.05 AND ABOUT 10% BY WEIGHT AND ANY WATER PRESENT BEING IN AN AMOUNT LESS THAN THAT REQUIRED TO RENDER THE REACTION MEDIUM HETEROGENEOUS.
Claim 2
Dependent Claim
67 words
THE PROCESS OF PRODUCING A PHENOL AND AN ALIPHATIC KETONE BY DECOMPOSITION OF AN A,A-DIALKYLARYLMETHYL HYDROPEROXIDE WHICH COMPRISES ADDING SAID HYDROPEROXIDE TO A HOMOGENEOUS REACTION MEDIUM COMPRISING ACETONE AND CONCENTRATED SULFURIC ACID, THE CONCENTRATION OF SAID ACID IN SAID MEDIUM BEING BETWEEN ABOUYT 0.05 AND ABOUT 10% BY WEIGHT AND ANY WATER PRESENT BEING IN AN AMOUNT LESS THAN THAT REQUIRED TO RENDER THE REACTION MEDIUM HETEROGENEOUS.
References Cited (Backward Citations)
GB629429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-21 | 1957-06-22 | 1957-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-21 | 1961-06-22 | 1961-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-21 | 1965-06-22 | 1965-12-22 | $7700.00 | Window Closed / Lapsed |