US3703593A
Expired / Lapsed
US
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Method of preparing an improved dehydrogenation catalyst
Assignee: Dow Chemical Co
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Filing: 1970-07-10
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Granted: 1972-11-21
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Expires: 1990-07-10
Abstract
Abstract A METHOD FOR PREPARING AN IMPROVED DEHYDROGENATION CATALYST COMPRISING IRON OXIDE, AN ALKALI METAL OXIDE, AND A CHROMIUM COMPOUND WHEREIN AN IMPROVEMENT IS ACHIEVED BY EMPLOYING BOTH YELLOW AND RED IRON OXIDES IN PARTICULAR PROPORTIONS WITH RESPECT TO EACH OTHER IN THE PREPARATION OF THE CATALYST.
Inventors
- 👤 Robert R Turley
- 👤 William M Castor
- 👤 Kenneth R Nunnally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:48
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J37/00; B01J37/0009; B01J37/0018; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |