Patent US2615899A successfully refreshed from Google Patents.
US2615899A
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Catalyst and process for ethylene oxide manufacture
Assignee: EIDP Inc
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Filing: 1949-06-23
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Granted: 1952-10-28
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Expires: 1969-06-23
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Sears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:56
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/54; B01J23/66; B01J23/68; B01J23/688; B01J23/70; B01J23/89; B01J23/8926; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A FLUID-FLOW CATALYTIC PROCESS FOR MAKING ETHYLENE OXIDE WHICH COMPRISES SUSPENDING THE CATALYST COMPOSITION CONSISTING ESSENTIALLY A SILVER CATALYST AND, AS A DILUENT, GRANULAR ARTICFICIAL GRAPHITE, THE ARTIFICIAL GRAPHITE COMPRISING FROM ABOUT 25 TO 75% OF THE VOLUME OF THE CATALYST COMPOSITION, IN A STREAM OF ETHYLENE AND OXYGENCONTAINING GAS AT A TEMPERATURE OF 150* C. TO 400* C.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |