Patent US2657980A successfully refreshed from Google Patents.
US2657980A
Expired / Lapsed
US
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Production of hydrogen peroxide
Assignee: EIDP Inc
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Filing: 1949-11-05
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Granted: 1953-11-03
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Expires: 1969-11-05
Abstract
No abstract record available.
Inventors
- 👤 Jerome W Sprauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:46
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN A PROCESS FOR THE PRODUCTION OF HYDROGEN PEROXIDE WHEREIN AN ALKYLATED ANTHRAQUINONE IS HYDROGENATED IN SOLUTION BY MEANS OF HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST TO YIELD AN ALKYLATED ANTHRAHYDROQUINONE, THE LATTER IS OXIDIZED TO PRODUCE HYDROGEN PEROXIDE AND TO REGENERATE SAID ANTHRAQUINONE AND SAID REGENERATED ANTHRAQUINONE IS RECYCLED TO THE HYDROGENATION STAGE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE HYDROGENATION CATALYST METALLIC PALLADIUM SUPPORTED ON ACTIVATED ALUMINA.
Claim 2
Dependent Claim
71 words
IN A PROCESS FOR THE PRODUCTION OF HYDROGEN PEROXIDE WHEREIN AN ALKYLATED ANTHRAQUINONE IS HYDROGENATED IN SOLUTION BY MEANS OF HYDROGEN IN THE PRESENCE OF A HYDROGENATION CATALYST TO YIELD AN ALKYLATED ANTHRAHYDROQUINONE, THE LATTER IS OXIDIZED TO PRODUCE HYDROGEN PEROXIDE AND TO REGENERATE SAID ANTHRAQUINONE AND SAID REGENERATED ANTHRAQUINONE IS RECYCLED TO THE HYDROGENATION STAGE, THE IMPROVEMENT WHICH COMPRISES EMPLOYING AS THE HYDROGENATION CATALYST METALLIC PALLADIUM SUPPORTED ON ACTIVATED ALUMINA.
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |