US2796439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aromatic hydrocarbons
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1954-07-16
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Granted: 1957-06-18
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Expires: 1974-07-16
Abstract
No abstract record available.
Inventors
- 👤 Berneis Kurt Helmut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:41
CPC Classifications
C; C07; C07C; C07C407/00; C07C407/003; C07C407/006; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/10; C07C409/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
140 words
A PROCESS FOR THE PRODUCTION OF TERTIARY HYDROPEROXIDES WHICH COMPRISES THE STEP OF CONTACTING AN AROMATIC HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF CUMENE, CYMENS, DI-ISOPROPYL BENZENES, SEC. BUTYL BENZENES AND CYCLOHEXYL BENZENE, IN TH E LIQUID PHASE UNDER ANHYDROUS CONDITIONS WITH A GAS CONTAINING FREE OXYGEN IN THE PRESENCE OF A PEROXIDE OXIDATION INITATOR CAPABLE OF INTIATING A FREE RADICAL OXIDATION CHAIN AND AN ALKALINE STABILISING AGENT CONSISTING OF A CARBONATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS AND MAGNESIUM, AND A SECOND ALKALINE STABILISING AGENT, WHICH IS A WEAK SOAP-FORMING ORGANIC ACID SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METALS, ALKALINE EARTH METALS AND MAGNESIUM, SAID STABILIZING AGENTS EACH BEING PRESENT IN AN AMOUNT FROM ABOUT 0.1% TO ABOUT 2% OF THE WEIGHT OF SAID AROMATIC HYDROCARBONS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-17 | 1960-12-17 | 1961-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-17 | 1964-12-17 | 1965-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-17 | 1968-12-17 | 1969-06-18 | $7700.00 | Window Closed / Lapsed |