US2632772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of peroxidic compounds
Assignee: Hercules Powder Co
•
Filing: 1948-03-19
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Granted: 1953-03-24
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Expires: 1968-03-19
Abstract
No abstract record available.
Inventors
- 👤 Armstrong Godfrey Paul
- 👤 Hall Reginald Harold
- 👤 Quin Denis Cheselden
- 👤 Turck Karl Heinrich Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:11
CPC Classifications
C; C07; C07C; C07C409/00; C07C409/02; C07C409/04; C07C409/08; C07C409/10; C07C407/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PRODUCTION OF ISOPROPYLBENZENE HYDROPEROXIDE WHICH COMPRISES CONTACTING A REACTION MIXTURE CONSISTING OF A DISPERSION IN LIQUID PHASE OF ISOPROPYLBENZENE AND AQUEOUS ALKALI WITH A GAS CONTAINING MOLECULAR OXYGEN AT A TEMPERATURE BETWEEN 70* AND 150* C., WHEREBY OXIDATION OF THE ISOPROPYLBENZENE TO ISOPROPYLBENZENE HYDROPEROXIDE TAKES PLACE, ADDING FRESH ISOPROPYLBENZENE TO THE REACTION MIXTURE WHILE THE OXIDATION PROCEEDS AND ADDING ALKALI IN AN AMOUNT SUFFICIENT TO NEUTRALIZE ANY CARBOXYLIC ACID FORMED DURING THE OXIDATION.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PRODUCTION OF ISOPROPYLBENZENE HYDROPEROXIDE WHICH COMPRISES CONTACTING A REACTION MIXTURE CONSISTING OF A DISPERSION IN LIQUID PHASE OF ISOPROPYLBENZENE AND AQUEOUS ALKALI WITH A GAS CONTAINING MOLECULAR OXYGEN AT A TEMPERATURE BETWEEN 70* AND 150* C., WHEREBY OXIDATION OF THE ISOPROPYLBENZENE TO ISOPROPYLBENZENE HYDROPEROXIDE TAKES PLACE, ADDING FRESH ISOPROPYLBENZENE TO THE REACTION MIXTURE WHILE THE OXIDATION PROCEEDS AND ADDING ALKALI IN AN AMOUNT SUFFICIENT TO NEUTRALIZE ANY CARBOXYLIC ACID FORMED DURING THE OXIDATION.
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) | 1956-03-23 | 1956-09-22 | 1957-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-23 | 1960-09-22 | 1961-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-23 | 1964-09-22 | 1965-03-24 | $7700.00 | Window Closed / Lapsed |