Patent US7991475B1 successfully refreshed from Google Patents.
US3049477A
Expired / Lapsed
US
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Production of cumene hydroperoxide
Assignee: Hercules Powder Co
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Filing: 1959-01-12
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Granted: 1962-08-14
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Expires: 1979-01-12
Abstract
No abstract record available.
Inventors
- 👤 Cooke Maurice Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:10
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/50; C04B41/5006; C07; C07C; C07C407/00; C07C407/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN THE PROCESS OF PRODUCING CUMENE HYDROPEROXIDE BY THE STEPS COMPRISING OXIDATION OF CUMENE IN THE LIQUID PHASE TO OBTAIN AN OXIDATION REACTION MIXTURE COMPRISING CUMENE HYDROPEROXIDE AND UNREACTED CUMENE, AND FRACTIONAL DISTILLATION OF THE OXIDATION REACTION MIXTURE IN A STILL TO OBTAIN AN OVERHEAD FRACTION COMPRISING CUMENE, WATER AND ORGANIC ACIDS AND A BOTTOMS PRODUCT COMPRISING CUMENE HYDROPEROXIDE IN A CONCENTRATION HIGHER THAN IT OCCURRED IN THE OXIDATION REACTION MIXTURE, THE IMPROVEMENT WHICH COMPRISES WITHDRAWING FROM THE STILL THE TOTAL OVERHEAD FRACTION COMPRISING CUMENE, WATER AND ORGANIC ACIDS, RECYCLING TO THE OXIDATION STEP AT LEAST THE CUMENE CONTAINED IN SAID TOTAL OVERHEAD FRACTION, AND ADDING TO THE STILL AS LIQUID REFLUX A FRESH CUMENE, CHARACTERIZED BY BEING SUBSTANTIALLY DRY AND HAVING A PH NOT SUBSTANTIALLY LESS THAN 5.
Claim 2
Dependent Claim
129 words
IN THE PROCESS OF PRODUCING CUMENE HYDROPEROXIDE BY THE STEPS COMPRISING OXIDATION OF CUMENE IN THE LIQUID PHASE TO OBTAIN AN OXIDATION REACTION MIXTURE COMPRISING CUMENE HYDROPEROXIDE AND UNREACTED CUMENE, AND FRACTIONAL DISTILLATION OF THE OXIDATION REACTION MIXTURE IN A STILL TO OBTAIN AN OVERHEAD FRACTION COMPRISING CUMENE, WATER AND ORGANIC ACIDS AND A BOTTOMS PRODUCT COMPRISING CUMENE HYDROPEROXIDE IN A CONCENTRATION HIGHER THAN IT OCCURRED IN THE OXIDATION REACTION MIXTURE, THE IMPROVEMENT WHICH COMPRISES WITHDRAWING FROM THE STILL THE TOTAL OVERHEAD FRACTION COMPRISING CUMENE, WATER AND ORGANIC ACIDS, RECYCLING TO THE OXIDATION STEP AT LEAST THE CUMENE CONTAINED IN SAID TOTAL OVERHEAD FRACTION, AND ADDING TO THE STILL AS LIQUID REFLUX A FRESH CUMENE, CHARACTERIZED BY BEING SUBSTANTIALLY DRY AND HAVING A PH NOT SUBSTANTIALLY LESS THAN 5.
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) | 1965-08-13 | 1966-02-12 | 1966-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-13 | 1970-02-12 | 1970-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-13 | 1974-02-12 | 1974-08-14 | $7700.00 | Window Closed / Lapsed |