US2585478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of olefin oxides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1949-12-28
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Granted: 1952-02-12
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Expires: 1969-12-28
Abstract
No abstract record available.
Inventors
- 👤 Levy Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:16
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE WHICH COMPRISES REACTING IN THE VAPOR PHASE AT A TEMPERATURE OF 150 TO 400* C. A MIXTURE OF ETHYLENE AND AN OXYGEN CONTAINING GAS IN WHICH THE PROPORTION BY VOLUME OF ETHYLENE IS UP TO 20% AND OF OXYGEN UP TO 20%, THE MOLAR RATIO OF OXYGEN TO ETHYLENE IN THE MIXTURE BEING AT LEAST 1:1, IN THE PRESENCE OF A SILVER-CONTAINING CATALYST COMPRISING SEPARATELY PERPARED SILVER OXIDE IN INTIMATE ADMIXTURE WITH FROM 0.5 TO 50% OF ITS OWN WEIGHT OF A POWDERED MATERIAL SELECTED FROM THE GROUP CONSISTING OF FUSED SILICA AND QUARTZ, WHICH POWDERED MATERIAL IS INCLUDED WITHIN THE INTRINSIC PHYSICAL STRUCTURE OF THE CATALYST.
Claim 2
Dependent Claim
115 words
A PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE WHICH COMPRISES REACTING IN THE VAPOR PHASE AT A TEMPERATURE OF 150 TO 400* C. A MIXTURE OF ETHYLENE AND AN OXYGEN CONTAINING GAS IN WHICH THE PROPORTION BY VOLUME OF ETHYLENE IS UP TO 20% AND OF OXYGEN UP TO 20%, THE MOLAR RATIO OF OXYGEN TO ETHYLENE IN THE MIXTURE BEING AT LEAST 1:1, IN THE PRESENCE OF A SILVER-CONTAINING CATALYST COMPRISING SEPARATELY PERPARED SILVER OXIDE IN INTIMATE ADMIXTURE WITH FROM 0.5 TO 50% OF ITS OWN WEIGHT OF A POWDERED MATERIAL SELECTED FROM THE GROUP CONSISTING OF FUSED SILICA AND QUARTZ, WHICH POWDERED MATERIAL IS INCLUDED WITHIN THE INTRINSIC PHYSICAL STRUCTURE OF THE CATALYST.
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |