US2805229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic oxidation of ethylene
Assignee: Individual
•
Filing: 1953-08-06
•
Granted: 1957-09-03
•
Expires: 1973-08-06
Abstract
No abstract record available.
Inventors
- 👤 Floyd J Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/48; B01J23/50; B01J8/00; B01J8/02; B01J8/06; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2219/00; B01J2219/30; B01J2219/302; B01J2219/30223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE CATALYTIC OXIDATION OF ETHYLENE TO FORM ETHYLENE OXIDE IN WHICH A GASEOUS MIXTURE CONTAINING ETHYLENE,, OXYGEN AND AN INERT GAS IS PASSED AT AN OXIDIZING TEMPERTURE THROUGH A SERIES OF SILVER-CATALYST-CONTAINING METAL TUBES SURROUNDED BY A HEAT-CONROLLING MEDIUM, THE IMPROVEMENT WHICH COMPRISES PASSES THE GASEOUS MIXTURE THROUGH SAID TUBES IN THE FORM OF CONTINUOUS, UNOBSTRUCTED, PARALLEL, LONGITUDINAL STREAMS OF SUBSTANTIALLY UNIFORM CROSS-SECTION THROUGHOUT THEIR TRAVEL THROUGH THE TUBES AND IN CONTACT THROUGHOUT SUCH TRAVEL WITH A CATALYST MADE UP OF SINTERED, POROUS ALUMINA HAVING CATALYTIC SILVER DEPOSITED THEREON AND THEREIN FROM AN AMMONIACAL SILVER SOLUTION BY DRYING AND HEATING TO FORM A SILVER CATALYST.
Claim 2
Dependent Claim
106 words
IN THE CATALYTIC OXIDATION OF ETHYLENE TO FORM ETHYLENE OXIDE IN WHICH A GASEOUS MIXTURE CONTAINING ETHYLENE,, OXYGEN AND AN INERT GAS IS PASSED AT AN OXIDIZING TEMPERTURE THROUGH A SERIES OF SILVER-CATALYST-CONTAINING METAL TUBES SURROUNDED BY A HEAT-CONROLLING MEDIUM, THE IMPROVEMENT WHICH COMPRISES PASSES THE GASEOUS MIXTURE THROUGH SAID TUBES IN THE FORM OF CONTINUOUS, UNOBSTRUCTED, PARALLEL, LONGITUDINAL STREAMS OF SUBSTANTIALLY UNIFORM CROSS-SECTION THROUGHOUT THEIR TRAVEL THROUGH THE TUBES AND IN CONTACT THROUGHOUT SUCH TRAVEL WITH A CATALYST MADE UP OF SINTERED, POROUS ALUMINA HAVING CATALYTIC SILVER DEPOSITED THEREON AND THEREIN FROM AN AMMONIACAL SILVER SOLUTION BY DRYING AND HEATING TO FORM A SILVER CATALYST.
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |