US2737527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of phenols and carbonyl compounds
Assignee: Rhone Poulenc SA
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Filing: 1952-05-15
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Granted: 1956-03-06
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Expires: 1972-05-15
Abstract
No abstract record available.
Inventors
- 👤 Mosnier Michel Marius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:47
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08; C07C45/00; C07C45/51; C07C45/53
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
134 words
A PROCESS FOR THE PRODUCTION OF PHENOLS AND CARBONYL COMPOUNDS BY THE DECOMPOSITION BY MEANS OF PERCHLORIC ACID OF A HYDROPEROXIDE OF AN ALKYL AROMATIC HYDROCARBON, OF WHICH THE ALKYL GROUP CONTAINS A CARBON ATOM SELECTED FROM THE CLASS CONSISTING OF SECONDARY AND TERTIARY CARBON ATOMS, SAID CARBON ATOM BEING DIRECTLY ATTACHED TO THE AROMATIC NUCLEUS, WHEREIN THE SUBSTANTIALLY PURE HYDROPEROXIDE AND PERCHLORIC ACID ARE BROUGHT INTO CONTACT AT ELEVATED TEMPERATURE IN THE PRESENCE OF A QUANTITY OF THE PHENOL TO BE FORMED IN THE REACTION TO FORM A HOMOGENEOUS REACTION MEDIUM, THE ACID BEING EMPLOYED IN THE FORM OF AN AQUEOUS SOLUTION CONTAINING NOT MORE THAN 1% BY WEIGHT OF PURE ACID BASED UPON THE HYDROPEROXIDE EMPLOYED AND THE QUANTITY OF THE PHENOL ADDED IS AT LEAST SUFFICIENT TO DISSOLVE THE AQUEOUS ACID.
References Cited (Backward Citations)
GB629429A
Cited
US2663735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |