US3803249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor phase conversion of acetone to 3,5-xylenol in a single stage
Assignee: Atlantic Richfield Co
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Filing: 1972-12-29
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Granted: 1974-04-09
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Expires: 1992-12-29
Abstract
Abstract METHOD FOR THE VAPOR PHASE CONVERSION OF ACETONE TO 3,5-XYLENOL IN A SINGLE STAGE OVER A MAGNESIUM OXIDE CATALYST IN THE PRESENCE OF WATER AND A HYDROCARBON AS DILUENTS. THE ADVANTAGES OF THIS INVENTION ARE EXCELLENT SINGLE STAGE SELECTIVELY TO 3,5-XYLENOL, HIGH CONVERSIONS OF ACETONE PER PASS, HIGH ULTIMATE YIELDS AND MAINTENANCE OF CATALYST ACTIVITY AFTER SUCCESSIVE CONVERSION-REGENERATION CYCLES.
Inventors
- 👤 R Rieve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:31
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/20
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |