Patent US2975033A successfully refreshed from Google Patents.
US2975033A
Expired / Lapsed
US
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Process for preparation of hydrogen peroxide
Assignee: FMC Corp
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Filing: 1957-11-21
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Granted: 1961-03-14
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Expires: 1977-11-21
Abstract
No abstract record available.
Inventors
- 👤 Kabisch Gerhard
- 👤 Richter Ekkehard
- 👤 Gross Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:12
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
IN A PROCESS FOR PRODUCING HYDROGEN PEROXIDE BY THE REDUCTION OF A WORKING INTERMEDIATE OF THE GROUP CONSISTING OF THE ALKYLANTHRAQUINONES, THEIR TETRAHYDRO DERIVATIVES AND MIXTURES THEREOF DISSOLVED IN A WORKING SOLVENT MIXTURE CONTAINING AT LEAST TWO SOLVENT COMPONENTS, AND THE RESULTING ANTHRAHYDROQUINONE SOLUTION IS OXIDIZED TO PRODUCE HYDROGEN PEROXIDE AND TO REFORM THE STARTING ANTHRAQUINONE, THE IMPROVEMENT COMPRISING EMPLOYING AN ARALKYL ALCOHOL OF THE FORMULA:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-13 | 1964-09-12 | 1965-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-13 | 1968-09-12 | 1969-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-13 | 1972-09-12 | 1973-03-14 | $7700.00 | Window Closed / Lapsed |