US3755552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing hydrogen peroxide
Assignee: FMC Corp
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Filing: 1970-10-21
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Granted: 1973-08-28
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Expires: 1990-10-21
Abstract
Abstract PROCESS FOR PRODUCING HYDROGEN PERIOXIDE BY ALTERNATELY, CATALYTICALLY HYDROGENATING AND OXIDIZING AN ANTHRAQUINON WORKING SOLUTION, WHEREIN HYDROGEN AND THE WORKING SOLUTION ARE PASSED IN CONTACT WITH A HYDROGENATION CATALYST CONTAINED IN A PLURALITY OF SUBSTANTIALLY VERTICALLY ORIENTED CYLINDERS AND WHEREIN THE RATIO OF THE DIAMETER OF EACH CYLINDER TO THE DIAMETER OF THE CATALYST PARTICLES IS AT LEAST 15:1.
Inventors
- 👤 N Lee
- 👤 W Schrock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |