Patent US3755423A successfully refreshed from Google Patents.
US3755423A
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Process for preparing an unsaturated glycol diester
Assignee: Mitsubishi Chemical Corp
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Filing: 1972-04-17
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Granted: 1973-08-28
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Expires: 1992-04-17
Abstract
Abstract UNSATURATED GLYCOL DIESTERS ARE PREPARED AT HIGH REACTION VELOCITIES, HIGH DEGREES OF CONVERSION AND HIGH SELECTIVITY, BY REACTING A CONJUGATED DIENE, A CARBOXYLIC ACID AND OXYGEN, IN THE PRESENCE OF A SOLID CATALYST CONTAINING PALLADIUM, AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF ANTOMONY, BISMUTH, TELLURIUM AND SELENIUM. TELLURIUM AND SELENIUM ARE PREFERRED SINCE THEY AID IN REDUCING THE QUANTITY OF PALLADIUM LOST IN THE REACTION MEDIUM.
Inventors
- 👤 T Onoda
- 👤 J Haji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:11
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/644; B01J20/00; B01J20/28; B01J20/28014; B01J20/2803; B01J20/30; B01J20/3085; B01J20/32; B01J20/3231; B01J20/3234; B01J20/3236; B01J27/00; B01J27/02; B01J27/057; B01J27/0573; B01J27/0576; C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |