Patent US3172893A successfully refreshed from Google Patents.
US3172893A
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US
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Ethylene oxtoationximproved s silver catalyst
Assignee: —
•
Filing: —
•
Granted: 1965-03-09
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Expires: 1982-03-09
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01J23/54; B01J23/66; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE BY OXIDATION OF ETHYLENE WITH OXYGEN IN THE PRESENCE OF A CATALYST, THE IMPROVEMENT OF EFFECTING SAID OXIDATION IN THE PRESENCE OF A CATALYST COMPOSED OF SILVER COATED PELLETS, SAID PELLETS FORMED BY BONDING A PLURALITY OF ALPHA ALUMINA PARTICLES HAVING DIAMETERS WITHIN THE RANGE OF ABOUT 400-600 MICRONS AND PORE DIAMETERS OF 80-200 MICRONS AND A POROSITY OF 40-50%.
Claim 2
Dependent Claim
69 words
IN A PROCESS FOR THE PRODUCTION OF ETHYLENE OXIDE BY OXIDATION OF ETHYLENE WITH OXYGEN IN THE PRESENCE OF A CATALYST, THE IMPROVEMENT OF EFFECTING SAID OXIDATION IN THE PRESENCE OF A CATALYST COMPOSED OF SILVER COATED PELLETS, SAID PELLETS FORMED BY BONDING A PLURALITY OF ALPHA ALUMINA PARTICLES HAVING DIAMETERS WITHIN THE RANGE OF ABOUT 400-600 MICRONS AND PORE DIAMETERS OF 80-200 MICRONS AND A POROSITY OF 40-50%.
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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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |