US3121099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the oxidation of olefins on silver catalyst graduated selectivity
Assignee: Montedison SpA
•
Filing: 1961-03-02
•
Granted: 1964-02-11
•
Expires: 1981-03-02
Abstract
No abstract record available.
Inventors
- 👤 Endler Harry Hermann Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR PRODUCING ETHYLENE OXIDE BY PARTIAL CATALYTIC OXIDATION OF ETHYLENE WHEREIN A REACTION MIXTURE OF ETHYLENE AND FREE OXYGEN-CONTAINING GASES, AT TEMPERATURES BETWEEN 150* AND 350*C., ARE PASSED THROUGH A CATALYTIC BED OF SILVER CATALYST OF WELL DEFINED SELECTIVITY, THE IMPROVEMENT WHICH CONSISTS OF ARRANGING THE BED IN ZONES OF CATALYSTS OF DECREASING SELECTIVITY IN THE DIRECTION OF TRAVEL OF THE GASEOUS REACTION MIXTURE THERETHROUGH.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR PRODUCING ETHYLENE OXIDE BY PARTIAL CATALYTIC OXIDATION OF ETHYLENE WHEREIN A REACTION MIXTURE OF ETHYLENE AND FREE OXYGEN-CONTAINING GASES, AT TEMPERATURES BETWEEN 150* AND 350*C., ARE PASSED THROUGH A CATALYTIC BED OF SILVER CATALYST OF WELL DEFINED SELECTIVITY, THE IMPROVEMENT WHICH CONSISTS OF ARRANGING THE BED IN ZONES OF CATALYSTS OF DECREASING SELECTIVITY 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) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |