Patent US3694376A successfully refreshed from Google Patents.
US3694376A
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US
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Oxidation-reduction regeneration of noble metal catalysts used in hydrogen peroxide production
Assignee: GERHARD E KABISCH
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Filing: 1970-07-13
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Granted: 1972-09-26
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Expires: 1990-07-13
Abstract
Abstract PALLADIUM ALONE, OR MIXED WITH OTHER METALS OF THE PLATINUM GROUP ON A SILICA CONTAINING CARRIER USED IN THE HYDROGENATION STEP OF THE ANTHRAQUINONE PROCESS FOR PRODUCING HYDROGEN PEROXIDE IS REGENERATED BY AN OXIDATION TREATMENT AT A PH BELOW 7 FOLLOWED BY A REDUCTION TREATMENT AT A TEMPERATURE BELOW 200*C., PREFERABLY BELOW 150*C.
Inventors
- 👤 Gerhard E Kabisch
- 👤 Siegfried H Raupach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:59
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
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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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |