US2653952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of
Assignee: —
•
Filing: —
•
Granted: 1953-09-29
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Expires: 1970-09-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:45
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/68; B01J23/688
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
IN THE OXIDATION OF ETHYLENE TO ETHYLENE OXIDE BY PASSING A STREAM OF A GASEOUS MIXTURE CONTAINING ETHYLENE AND OXYGEN OVER A CATALYST HAVING AN ACTIVE SILVE SURFACE AT A TEMPERATURE RANGING FROM ABOUT 220* C. TO 350* C. TO OXIDIZE THE ETHYLENE TO ETHYLENE OXIDE, THE IMPROVEMENT COMPRISING ADDING HELIUM TO THE ETHYLENE-CONTAINING GASEOUS MIXTURE IN QUANTITIES TO GIVE A CONCENTRATION OF ETHYLENE AND OXYGEN SUITABLE FOR THE OXIDATION REACTION.
Claim 2
Dependent Claim
71 words
IN THE OXIDATION OF ETHYLENE TO ETHYLENE OXIDE BY PASSING A STREAM OF A GASEOUS MIXTURE CONTAINING ETHYLENE AND OXYGEN OVER A CATALYST HAVING AN ACTIVE SILVE SURFACE AT A TEMPERATURE RANGING FROM ABOUT 220* C. TO 350* C. TO OXIDIZE THE ETHYLENE TO ETHYLENE OXIDE, THE IMPROVEMENT COMPRISING ADDING HELIUM TO THE ETHYLENE-CONTAINING GASEOUS MIXTURE IN QUANTITIES TO GIVE A CONCENTRATION OF ETHYLENE AND OXYGEN SUITABLE FOR THE OXIDATION REACTION.
References Cited (Backward Citations)
GB531256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |