US2915557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering di-isopropylbenzene-di-hydroperoxide from di-isopropylbenzene oxidation products
Assignee: Shell Development Co
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Filing: 1957-06-03
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Granted: 1959-12-01
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Expires: 1977-06-03
Abstract
No abstract record available.
Inventors
- 👤 Robert W F Kreps
- 👤 Wit Willem F De
- 👤 Schuur Gerrit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:58
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/12; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE NETHOD OF SEPERATING META-ISOPROPYLBENZENE-DIHYDROPEROXIDE FROM A MIXTURE COMPRISING SAID META-DI-ISOPROPYLBENZENE-DI-HYDROPEROXIDE IN ADMIXTURE WITH DI-ISOPROPYLBENZENE AND DI-ISOPROPYLBENZENE-MONOHYDROPEROXIDE WHICH COMPRISES ADDING TO SAID MIXTURE A HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC SATURATED HYDROCARBONS AND ALKYLBENZENES HAVING A BOILING TEMPERATURE BELOW ABOUT 150*C. AND CRYSTALLIZING META-DI-ISOPROPYLBENZENE-DI-HYDROPEROXIDE FROM THE RESULTING ADDED HYDROCARBON-CONTAINING MIXTURE.
Claim 2
Dependent Claim
52 words
THE NETHOD OF SEPERATING META-ISOPROPYLBENZENE-DIHYDROPEROXIDE FROM A MIXTURE COMPRISING SAID META-DI-ISOPROPYLBENZENE-DI-HYDROPEROXIDE IN ADMIXTURE WITH DI-ISOPROPYLBENZENE AND DI-ISOPROPYLBENZENE-MONOHYDROPEROXIDE WHICH COMPRISES ADDING TO SAID MIXTURE A HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC SATURATED HYDROCARBONS AND ALKYLBENZENES HAVING A BOILING TEMPERATURE BELOW ABOUT 150*C. AND CRYSTALLIZING META-DI-ISOPROPYLBENZENE-DI-HYDROPEROXIDE FROM THE RESULTING ADDED HYDROCARBON-CONTAINING MIXTURE.
References Cited (Backward Citations)
GB641250A
Cited
US2715646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |