Patent US3778468A successfully refreshed from Google Patents.
US3778468A
Expired / Lapsed
US
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Process for preparing ethylene glycol esters
Assignee: Halcon Research and Development Corp
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Filing: 1972-06-27
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Granted: 1973-12-11
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Expires: 1992-06-27
Abstract
Abstract ETHYLENE GLYCOL ESTERS ARE PREPARED BY THE MOLECULAR OXYGEN OXIDATION OF ETHYLENE IN THE PRESENCE OF A LIQUID PHASE REACTION MEDIUM CONTAINING A CARBOXYLIC ACID, WITH THE REACTION BEING CATALYZED BY CATIONIC SELENIUM AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF ELEMENTAL BROMINE, ELEMENTAL CHLORINE, A BROMINE-CONTAINING COMPOUND AND A CHLORINE-CONTAINING COMPOUND.
Inventors
- 👤 J Kollar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:06
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/08; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |