US3761397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfide precipitated catalysts
Assignee: Shell USA Inc
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Filing: 1972-04-05
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Granted: 1973-09-25
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Expires: 1992-04-05
Abstract
Abstract A SUPPORTED METAL SULFIDE CATALYST PREPARED BY IMPREGNATING A POROUS SOLID CATALYST SUPPORT WITH AN AQUEOUS SOLUTION OF A SALT OF A HYDROGENATION METAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM, TUNGSTEN, IRON GROUP METALS, AND MIXTURES THEREOF, PRECIPITATING THE RESPECTIVE METAL SULFIDES AND SUBSEQUENTLY DRYING IN AN INERT ATMOSPHERE POSSESSES IMPROVED HYDROGENATION, DENITRIFICATION AND DESULFURIZATION ACTIVITY.
Inventors
- 👤 A Gatti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:31
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/02; B01J27/04; B01J27/047; B01J27/043; B01J27/049; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |