US3775346A
Expired / Lapsed
US
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Method of preparing supported oxidation catalysts for producing ethylene oxide
Assignee: Societa Italiana Resine SpA SIR
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Filing: 1971-08-26
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Granted: 1973-11-27
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Expires: 1991-08-26
Abstract
Abstract ETHYLENE OXIDATION CATALYSTS ARE PREPARED BY IMPREGNATING A SUPPORT WITH A HIGH-BOILING INERT ORGANIC LIQUID SUCH AS DECANE OR ETHYLENE GYLCOL, FURTHER IMPREGNATING THE SUPPORT WITH A SOLUTION OF SILVER LACTATE IN LACTIC ACID, DRYING AND HEATING.
Inventors
- 👤 B Calcagno
- 👤 N Ferlazzo
- 👤 M Ghirga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:50
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; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |