US3654181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for activation of iron oxide containing dehydrogenation catalysts
Assignee: Dow Chemical Co
•
Filing: 1970-10-21
•
Granted: 1972-04-04
•
Expires: 1990-10-21
Abstract
Abstract A METHOD OF ACTIVATION OF THE SELF-REGENERATING IRON OXIDE CATALYSTS EMPLOYED TO DEHYDROGENTATE ETHYLBENZENE TO STYRENE BY OPERATING THE REACTOR CONTAINING SUCH CATALYST SO AS TO PRODUCE ABNORMALLY HIGH CONVERSIONS OF ETHYLBENZENE FOR A PERIOD OF AT LEAST TWO DAYS. THEREAFTER, THE ACTIVITY OF THE CATALYST IS IMPROVED AT THE USUAL LEVELS OF CONVERSION.
Inventors
- 👤 Samuel S Sutherland Jr
- 👤 George W Dailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:15
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/94; C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/584; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |