Patent US4677318A successfully refreshed from Google Patents.
Patent US2966397A successfully refreshed from Google Patents.
US2966397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of hydrogen peroxide
Assignee: FMC Corp
•
Filing: 1956-10-24
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Granted: 1960-12-27
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Expires: 1976-10-24
Abstract
No abstract record available.
Inventors
- 👤 Leonard R Darbee
- 👤 Donald F Kreuz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:01
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN THE METHOD OF PRODUCING HYDROGEN PEROXIDE BY THE CYCLIC REDUCTION AND OXIDATION OF A WORKING MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE ALKYLATED ANTHRAQUINONES AND THEIR TETRAHYDRO DERIVATIVES, THE IMPROVEMENT WHICH COMPRISES SELECTING AS THE WORKING MATERIAL A MIXTURE OF AT LEAST 2 CONSTITUENTS OF THE GROUP MENTIONED ABOVE AND AT A WORKING MATERIAL CONCENTRA-
Claim 2
Dependent Claim
57 words
IN THE METHOD OF PRODUCING HYDROGEN PEROXIDE BY THE CYCLIC REDUCTION AND OXIDATION OF A WORKING MATERIAL SELECTED FROM THE GROUP CONSISTING OF THE ALKYLATED ANTHRAQUINONES AND THEIR TETRAHYDRO DERIVATIVES, THE IMPROVEMENT WHICH COMPRISES SELECTING AS THE WORKING MATERIAL A MIXTURE OF AT LEAST 2 CONSTITUENTS OF THE GROUP MENTIONED ABOVE AND AT A WORKING MATERIAL CONCENTRA-
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) | 1963-12-27 | 1964-06-27 | 1964-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-27 | 1968-06-27 | 1968-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-27 | 1972-06-27 | 1972-12-27 | $7700.00 | Window Closed / Lapsed |