US2709173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of olefins and catalyst therefor
Assignee: California Research LLC
•
Filing: 1950-01-09
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Granted: 1955-05-24
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Expires: 1970-01-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred S Brengle
- 👤 Harold R Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
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; B01J23/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A PROCESS OF MAKING ETHYLENE OXIDE WHICH COMPRISES CONTACTING A MIXTURE OF ETHYLENE AND FREE OXYGENCONTAINING GAS AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 750* F., A SPECE VELOCITY FROM ABOUT 150 TO ABOUT 3600 VOLUMES OF GAS PER VOLUME OF CATALYST PER HOUR, AND SUBSTANTIALLY ATMOSPHERIC PRESSURE WITH A SILVER SURFACE CATALYST CONSISTING ESSENTIALLY OF SILVER, FROM ABOUT 2 TO 15% BY WEIGHT BASED ON THE SILVER OF BARIUM PEROXIDE AND FROM ABOUT 0.0001 TO ABOUT 0.1% BY WEIGHT BASED ON THE SILVER OF LITHIUM BROMIDE ON AN ALUMINA CATALYST CARRIER, SAID CARRIER BEING PRESENT IN AN AMOUNT SUFFICIENT TO SUPPORT THE CATALYST COMPOSITION.
Claim 2
Dependent Claim
107 words
A PROCESS OF MAKING ETHYLENE OXIDE WHICH COMPRISES CONTACTING A MIXTURE OF ETHYLENE AND FREE OXYGENCONTAINING GAS AT A TEMPERATURE OF FROM ABOUT 300 TO ABOUT 750* F., A SPECE VELOCITY FROM ABOUT 150 TO ABOUT 3600 VOLUMES OF GAS PER VOLUME OF CATALYST PER HOUR, AND SUBSTANTIALLY ATMOSPHERIC PRESSURE WITH A SILVER SURFACE CATALYST CONSISTING ESSENTIALLY OF SILVER, FROM ABOUT 2 TO 15% BY WEIGHT BASED ON THE SILVER OF BARIUM PEROXIDE AND FROM ABOUT 0.0001 TO ABOUT 0.1% BY WEIGHT BASED ON THE SILVER OF LITHIUM BROMIDE ON AN ALUMINA CATALYST CARRIER, SAID CARRIER BEING PRESENT IN AN AMOUNT SUFFICIENT TO SUPPORT THE CATALYST COMPOSITION.
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) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |