Patent US4488896A successfully refreshed from Google Patents.
Patent US2564070A successfully refreshed from Google Patents.
Patent US2019055A successfully refreshed from Google Patents.
Patent US1399563A successfully refreshed from Google Patents.
Patent US2940987A successfully refreshed from Google Patents.
US2940987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of degraded anthraquinone working solutions used for producing hydrogen peroxide
Assignee: EIDP Inc
•
Filing: 1957-05-24
•
Granted: 1960-06-14
•
Expires: 1977-05-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Carl W Eller
- 👤 James M Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:07
CPC Classifications
C; C01; C01B; C01B15/00; C01B15/01; C01B15/022; C01B15/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE METHOD OF REGENERATING A WORKING SOLUTION OF AN ANTHRAQUINONE IN A WATER-IMMISCIBLE SOLVENT, SAID SOLUTION HAVING BECOME DEGRADED THROUGH USE IN CYCLIC REDUCTION AND OXIDATION OPERATIONS FOR THE PRODUCTION OF HYDROGEN PERIOXIDE, SAID METHOD COMPRISING CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN THROUGH THE DEGRADED SOLUTION WHILE SAID DEGRADED SOLUTION IS HEATED TO A TEMPERATURE OF FROM 95 TO 300*C., SAID GAS HAVING A FREE OXYGEN CONTENT OF 1 TO 100% AND BEING DEVOID OF ANY COMPONENT OTHER THAN SAID FREE OXYGEN WHICH IS REACTIVE UNDER THE CONDITIONS EMPLOYED.
Claim 2
Independent Claim
90 words
THE METHOD OF REGENERATING A WORKING SOLUTION OF AN ANTHRAQUINONE IN A WATER-IMMISCIBLE SOLVENT, SAID SOLUTION HAVING BECOME DEGRADED THROUGH USE IN CYCLIC REDUCTION AND OXIDATION OPERATIONS FOR THE PRODUCTION OF HYDROGEN PERIOXIDE, SAID METHOD COMPRISING CONTINUOUSLY PASSING A GAS CONTAINING FREE OXYGEN THROUGH THE DEGRADED SOLUTION WHILE SAID DEGRADED SOLUTION IS HEATED TO A TEMPERATURE OF FROM 95 TO 300*C., SAID GAS HAVING A FREE OXYGEN CONTENT OF 1 TO 100% AND BEING DEVOID OF ANY COMPONENT OTHER THAN SAID FREE OXYGEN WHICH IS REACTIVE UNDER THE CONDITIONS EMPLOYED.
References Cited (Backward Citations)
US2739875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-14 | 1963-12-14 | 1964-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-14 | 1967-12-14 | 1968-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-14 | 1971-12-14 | 1972-06-14 | $7700.00 | Window Closed / Lapsed |