US2554459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene oxide process and catalyst therefor
Assignee: Monsanto Chemicals Ltd
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Filing: 1948-03-20
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Granted: 1951-05-22
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Expires: 1968-03-20
Abstract
No abstract record available.
Inventors
- 👤 Rudolph L Heider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE PROCESS FOR MAKING ETHYLENE OXIDE BY THE DIRECT CHEMICAL COMBINATION OF ETHYLENE AND OXYGEN ON A SILVER CATALYST WHICH COMPRISES PASSING ETHYLENE AND GASES CONTAINING MOLECULAR OXYGEN AT TEMPERATURE BETWEEN 250* C. AND 300* C. OVER A SILVER CATALYST SURFACE SUPPORTED UPON A CARRIER COMPRISING FUSED BERYLLIUM OXIDE.
Claim 2
Dependent Claim
49 words
THE PROCESS FOR MAKING ETHYLENE OXIDE BY THE DIRECT CHEMICAL COMBINATION OF ETHYLENE AND OXYGEN ON A SILVER CATALYST WHICH COMPRISES PASSING ETHYLENE AND GASES CONTAINING MOLECULAR OXYGEN AT TEMPERATURE BETWEEN 250* C. AND 300* C. OVER A SILVER CATALYST SURFACE SUPPORTED UPON A CARRIER COMPRISING FUSED BERYLLIUM OXIDE.
References Cited (Backward Citations)
US2354892A
Cited
US2307421A
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US2393537A
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US2424083A
Cited
US2424084A
Cited
US2430443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |