US2764598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical process
Assignee: —
•
Filing: —
•
Granted: 1956-09-25
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Expires: 1973-09-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
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
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE PREPARATION OF ETHYLENE OXIDE BY THE DIRECT PARTIAL OXIDATION OF ETHYLENE WHICH COMPRISES PASSING A GASEOUS REACTION MIXTURE OF ETHYLENE AND OXYGEN THROUGH A REACTION ZONE AT A TEMPERATURE IN THE RANGE OF 150 TO 400* C., SAID ZONE CONTAINING CATALYST PARTICLES OF A REFRACTORY INORGANIC SUPPORT COATED WITH ACTIVE SILVER, SAID COATED PARTICLES BEING SUBSTANTIALLY EQUIVALENT IN SIZE, ALL OF THE SAID PARTICLES IN ANY CROSS-SECTIONAL REGION OF SAID ZONE BEING OF SUBSTNTIALLY EQUAL ACTIVITY, THE ACTIVITY OF THE PARTICLES IN SAID ZONE BEING SUCH THAT THE ZONE IS OF INCREASING ACTIVITY IN THE DIRECTION OF TRAVEL OF THE GASEOUS REACTION MIXTURE THERETHROUGH.
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE PREPARATION OF ETHYLENE OXIDE BY THE DIRECT PARTIAL OXIDATION OF ETHYLENE WHICH COMPRISES PASSING A GASEOUS REACTION MIXTURE OF ETHYLENE AND OXYGEN THROUGH A REACTION ZONE AT A TEMPERATURE IN THE RANGE OF 150 TO 400* C., SAID ZONE CONTAINING CATALYST PARTICLES OF A REFRACTORY INORGANIC SUPPORT COATED WITH ACTIVE SILVER, SAID COATED PARTICLES BEING SUBSTANTIALLY EQUIVALENT IN SIZE, ALL OF THE SAID PARTICLES IN ANY CROSS-SECTIONAL REGION OF SAID ZONE BEING OF SUBSTNTIALLY EQUAL ACTIVITY, THE ACTIVITY OF THE PARTICLES IN SAID ZONE BEING SUCH THAT THE ZONE IS OF INCREASING ACTIVITY IN THE DIRECTION OF TRAVEL OF THE GASEOUS REACTION MIXTURE THERETHROUGH.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |