US3816604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of alkaline hyperoxide
Assignee: Air Liquide SA
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Filing: 1972-07-03
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Granted: 1974-06-11
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Expires: 1992-07-03
Abstract
Abstract ALKALINE HYPEROXIDES (SUPEROXIDES) ARE PREPRED BY FORMING. A CONCENTRATED AQUEOUS SOLUTION OF ALKALINE HYDROXIDE AND HYDROGEN PEROXIDE ITSELF CONTINUOUSLY PREPARED BY ADDING THE TWO REAGENTS TO A PREFROMED MIXTURE THEREOF, SUCH THAT THE ALKALINE HYDROXIDE AND HYDROGEN PROXIDE AT A TITER AT LEAST EQUAL TO 85% ARE MAINTAINED AT A MOLAR RATIO 1.5<H2O2/MOH<1.75 AND THE TEMPERATURE OF THE SOLUTION IS <10* C.; AND THEN ALKALINE HYPEROXIDE IS PREPARED FROM THE SAID SOLUTION BY CONTINUOUS, PUNCTUAL, RAPID DEHYDRATION. THE RESULTANT PULVERULENT COMPOSITIONS ARE PARTICULARLY SUITABLE FOR PELLETING.
Inventors
- 👤 J Malafosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:26
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/04; C01B15/043; C01B15/0435; B; B01; B01J; B01J2/00; B01J2/24
Claims Analysis
Total Claims: 0
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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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |