Patent US2655545A successfully refreshed from Google Patents.
US2655545A
Expired / Lapsed
US
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Manufacture of alpha, alpha-dimethylbenzylhydroperoxide
Assignee: FARBENFABRIKEN BAYERK
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Filing: 1951-03-03
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Granted: 1953-10-13
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Expires: 1971-03-03
Abstract
No abstract record available.
Inventors
- 👤 Bruning Eberhard
- 👤 Delfs Detlef
- 👤 Spielberger Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:16
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/10; A; A61; A61F; A61F2/00; A61F2/50; A61F2/54; C07C407/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF A,A-DIMETHYLBENZYLHYDROPEROXIDE WHICH COMPRISES REACTING ISOPROPYLBENZENE WITH MOLECULAR OXYGEN AT ELEVATED TEMPERATURES NOT EXCEEDING THE BOILING TEMPERATURE OF THE ISOPROPYLBENZENE, IN THE PRESENCE OF A TRANSITION METAL, THE CONCENTRATION OF SAID TRANSITION METAL DISSOLVED IN THE REACTION MIXTURE NOT EXCEEDING THAT CONCENTRATION OF THE SAME CATALYST WHICH DECOMPOSES 1/10 OF THE PEROXIDE CONTENT OF A MIXTURE OF 15 PARTS BY WEIGHT OF A,A-DIMETHYLBENZYLHYDROPEROXIDE AND 85 PARTS BY WEIGHT OF ISOPROPYLBENZENE AT A TEMPERATURE OF 80* C. WITHIN 45 HOURS.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE MANUFACTURE OF A,A-DIMETHYLBENZYLHYDROPEROXIDE WHICH COMPRISES REACTING ISOPROPYLBENZENE WITH MOLECULAR OXYGEN AT ELEVATED TEMPERATURES NOT EXCEEDING THE BOILING TEMPERATURE OF THE ISOPROPYLBENZENE, IN THE PRESENCE OF A TRANSITION METAL, THE CONCENTRATION OF SAID TRANSITION METAL DISSOLVED IN THE REACTION MIXTURE NOT EXCEEDING THAT CONCENTRATION OF THE SAME CATALYST WHICH DECOMPOSES 1/10 OF THE PEROXIDE CONTENT OF A MIXTURE OF 15 PARTS BY WEIGHT OF A,A-DIMETHYLBENZYLHYDROPEROXIDE AND 85 PARTS BY WEIGHT OF ISOPROPYLBENZENE AT A TEMPERATURE OF 80* C. WITHIN 45 HOURS.
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) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |