US2523686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydration of olefins to produce ketones
Assignee: Shell Development Co
•
Filing: 1947-05-31
•
Granted: 1950-09-26
•
Expires: 1967-05-31
Abstract
No abstract record available.
Inventors
- 👤 Engel Willem Frederik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:46
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/27; C07C45/28; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/868
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
59 words
A PROCESS FOR THE PRODUCTION OF ACETONE COMPRISING TREATING PROPYLENE WITH A MOLAR EXCESS OF STEAM AT A TEMPERATURE OF BETWEEN ABOUT 325*C. AND ABOUT 425*C. UNDER A PRESSURE OF BETWEEN ABOUT 12 ATMOSPHERES AND ABOUT 24 ATMOSPHERES IN THE PRESENCE OF A CATALYST CONSISTING OF MAJOR PORTION OF COPPER AND ALUMINA WITH A MINOR PORTION OF THORIUM OXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-25 | 1954-03-27 | 1954-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-25 | 1958-03-27 | 1958-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-25 | 1962-03-27 | 1962-09-26 | $7700.00 | Window Closed / Lapsed |