US3767779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacturing hydrogen peroxide
Assignee: Oxysynthese SA
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Filing: 1971-07-06
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Granted: 1973-10-23
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Expires: 1991-07-06
Abstract
Abstract A WORKING SOLUTION OF QUINONE AND TETRAHYDROQUINONE DISSOLVED IN AN ORGANIC SOLVENT IS SUBJECTED TO HYDROGENATION-OXIDATION REACTIONS AND THE HYDROGEN PEROXIDE FORMED IN EACH OXIDATION STAGE IS REMOVED, AND THE WORKING SOLUTION IS RECYCLED, THE RATE OF HYDROGENATION PREFERABLY BEING AT LEAST 80% OF THE THEORETICAL MAXIMUM AND THE TETRAHYDROQUINONE PREFERABLY FORMING THE MAJOR PART OF THE QUINONE AND T ETRAHYDROQUINONE, WHEREIN THE WORKING SOLUTION CONTAINS NOT LESS THAN 150 G. PER LITRE OF DEGRADED SUBSTANCES.
Inventors
- 👤 M Coingt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:33
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |