US3755434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of olefins to unsaturated acids and aldehydes
Assignee: Celanese Corp
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Filing: 1972-02-15
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Granted: 1973-08-28
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Expires: 1992-02-15
Abstract
Abstract A PROCESS FOR THE OXIDATION OF OLEFINS TO THE CORRESPONDING UNSATURATED ALDEHYDES AND ACIDS, E.G., PROPYLENE TO ACROLEIN AND ACRYLIC ACID, BY REACTING THE OLEFIN WITH OXYGEN IN THE PRESENCE OF A CATALYST OF THE EMPIRICAL FORMULA MOACOBTECXDOE WHEREIN X IS RHODIUM OR BORON. WHEN A IS 100, B IS 40200, C IS 0.1-7.0 AND D IS 5-75 WHEN X IS RHODIUM AND IS 0.1 TO 3.0 WHEN X IS BORON.
Inventors
- 👤 L Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:41
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/32; C07C45/33; C07C45/34; C07C45/35; B; B01; B01J; B01J27/00; B01J27/02; B01J27/057; B01J27/0576; C07C51/00; C07C51/16; C07C51/21; C07C51/25; C07C51/252; B01J2523/00
Claims Analysis
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References Cited (Backward Citations)
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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) | 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 |