Patent US2697104A successfully refreshed from Google Patents.
US2697104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of ethylene oxide
Assignee: —
•
Filing: —
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Granted: 1954-12-14
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Expires: 1971-12-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:42
CPC Classifications
C; C07; C07C; C07C31/00; C07C31/18; C07C31/20; C07C31/202; C07D; C07D301/00; C07D301/32; C07C29/00; C07C29/09; C07C29/10; C07C29/103; C07C29/106; C07C29/12; C07C29/74; C07C29/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR THE REDUCTION OF THE ACETALDEHYDE CONTENT OF ETHYLENE OXIDE CONTAINING SUBSTANTIAL QUANTITIES OF ACETALDEHYDE AS AN IMPURITY, WHICH COMPRISES CONTINUOUSLY PASSING A HOMOGENEOUS LIQUID MIXTURE OF ETHYLENE OXIDE, AND ALKALI METAL GLYCOLATE AND A NORMALLY LIQUID SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE GLYCOLS, POLYOXYPROPYLENE GLYCOLS AND POLYOXYPROPYLENEOXYETHYLENE GLYCOL OF A MOLECULAR WEIGHT BETWEEN 100 AND 700, THROUGH A REACTION ZONE AT A TEMPERATURE MAINTAINED BETWEEN 0 AND 180* C. AND UNDER A PRESSURE WHICH MAINTAINS SAID MIXTURE IN THE LIQUID PHASE, AND THEREAFTER RECOVERING PURIFIED ETHYLENE OXIDE FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
96 words
A PROCESS FOR THE REDUCTION OF THE ACETALDEHYDE CONTENT OF ETHYLENE OXIDE CONTAINING SUBSTANTIAL QUANTITIES OF ACETALDEHYDE AS AN IMPURITY, WHICH COMPRISES CONTINUOUSLY PASSING A HOMOGENEOUS LIQUID MIXTURE OF ETHYLENE OXIDE, AND ALKALI METAL GLYCOLATE AND A NORMALLY LIQUID SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF POLYOXYETHYLENE GLYCOLS, POLYOXYPROPYLENE GLYCOLS AND POLYOXYPROPYLENEOXYETHYLENE GLYCOL OF A MOLECULAR WEIGHT BETWEEN 100 AND 700, THROUGH A REACTION ZONE AT A TEMPERATURE MAINTAINED BETWEEN 0 AND 180* C. AND UNDER A PRESSURE WHICH MAINTAINS SAID MIXTURE IN THE LIQUID PHASE, AND THEREAFTER RECOVERING PURIFIED ETHYLENE OXIDE FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
US2615901A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-13 | 1958-06-14 | 1958-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-13 | 1962-06-14 | 1962-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-13 | 1966-06-14 | 1966-12-14 | $7700.00 | Window Closed / Lapsed |