US2985668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of olefin oxides
Assignee: Individual
•
Filing: 1957-01-30
•
Granted: 1961-05-23
•
Expires: 1977-01-30
Abstract
No abstract record available.
Inventors
- 👤 Shingu Haruo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:02
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
THE PROCESS FOR PREPARING ETHYLENE OXIDE WHICH COMPRISES REACTING ETHYLENE WITH MOLECULAR OXYGEN BY BRINGING A VAPOR MIXTURE OF ETHYLENE AND AN ELEMENTAL OXYGEN CONTAINING GAS, IN WHICH THE MOLE RATIO OF OXYGEN TO ETHYLENE IS LESS THAN 0.35, IN A LIQUID THE BOILING POINT OF EFFECTED BY USING AN ORGANIC LIQUID THE BOILING POINT OF WHICH IS HIGHER THAN THAT OF THE RESULTING OXIDATION PROUCTS INTO CONTACT WITH A FINELY DIVIDED SOLID OXIDATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COOPER, COOPER OXIDE, SILVER, SILVER OXIDE AND MIXTURES THEREOF WHICH IS SUSPENDED IN THE LIQUID AT A TEMPERATURE OF FROM 180* TO 250*C. AND RECOVERING THE REACTION PRODUCTS AS AN EFFLUENT VAPOR MIXTURE FROM SAID LIQUID PHASE.
Claim 2
Dependent Claim
118 words
THE PROCESS FOR PREPARING ETHYLENE OXIDE WHICH COMPRISES REACTING ETHYLENE WITH MOLECULAR OXYGEN BY BRINGING A VAPOR MIXTURE OF ETHYLENE AND AN ELEMENTAL OXYGEN CONTAINING GAS, IN WHICH THE MOLE RATIO OF OXYGEN TO ETHYLENE IS LESS THAN 0.35, IN A LIQUID THE BOILING POINT OF EFFECTED BY USING AN ORGANIC LIQUID THE BOILING POINT OF WHICH IS HIGHER THAN THAT OF THE RESULTING OXIDATION PROUCTS INTO CONTACT WITH A FINELY DIVIDED SOLID OXIDATION CATALYST SELECTED FROM THE GROUP CONSISTING OF COOPER, COOPER OXIDE, SILVER, SILVER OXIDE AND MIXTURES THEREOF WHICH IS SUSPENDED IN THE LIQUID AT A TEMPERATURE OF FROM 180* TO 250*C. AND RECOVERING THE REACTION PRODUCTS AS AN EFFLUENT VAPOR MIXTURE FROM SAID LIQUID PHASE.
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |