US2785186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethylene oxide using alkyl silicones and silanes as carbon dioxide repressant
Assignee: Chempatents Inc
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Filing: 1953-04-10
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Granted: 1957-03-12
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Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
- 👤 Landau Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:33
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR PRODUCING ETHYLENE OXIDE BY THE PARTIAL OXIDATION OF ETHYLENE BY MEANS OF GASEOUS OXYGEN IN THE PRESENCE OF SILVER-CONTAINING CATALYST AT A TEMPERATURE RANGE OF ABOUT 150*C. TO 400*C., THE IMPROVEMENT WHICH COMPRISES PROVIDING IN THE REACTION ZONE AN AMOUNT IN THE RANGE OF ABOUT 0.5 TO 500 P. P. M., BASED UPON THE GASEOUS FEED MIXTURE, OF A SILICON CONTAINING COMPOUND CHOSEN FROM THE CLASS CONSISTING OF ALKYL SILICONES AND SILANES, SAID COMPOUND HAVING A SUFFICIENT VOLATILITY TO PROVIDE SAID AMOUNT THEREOF AT SAID TEMPERATURE, WHEREBY EXCESSIVE FORMATION OF CARBON DIOXIDE IS SUPPRESSED.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR PRODUCING ETHYLENE OXIDE BY THE PARTIAL OXIDATION OF ETHYLENE BY MEANS OF GASEOUS OXYGEN IN THE PRESENCE OF SILVER-CONTAINING CATALYST AT A TEMPERATURE RANGE OF ABOUT 150*C. TO 400*C., THE IMPROVEMENT WHICH COMPRISES PROVIDING IN THE REACTION ZONE AN AMOUNT IN THE RANGE OF ABOUT 0.5 TO 500 P. P. M., BASED UPON THE GASEOUS FEED MIXTURE, OF A SILICON CONTAINING COMPOUND CHOSEN FROM THE CLASS CONSISTING OF ALKYL SILICONES AND SILANES, SAID COMPOUND HAVING A SUFFICIENT VOLATILITY TO PROVIDE SAID AMOUNT THEREOF AT SAID TEMPERATURE, WHEREBY EXCESSIVE FORMATION OF CARBON DIOXIDE IS SUPPRESSED.
References Cited (Backward Citations)
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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) | 1960-03-11 | 1960-09-10 | 1961-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-11 | 1964-09-10 | 1965-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-11 | 1968-09-10 | 1969-03-12 | $7700.00 | Window Closed / Lapsed |