US3789019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of catalysts useful in oxidation of so2 gases
Assignee: EIDP Inc
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Filing: 1971-12-27
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Granted: 1974-01-29
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Expires: 1991-12-27
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS FOR PREPARING A CATALYTIC MATERIAL HAVING HIGH EFFICENCY IN THE OXIDATING OF SO2 RO SO3 WHICH ENTAILS PREPARING A HOMOGENEOUS MIXTURE COMPRISING A CATALYRICALLY EFFECTIVE AMOUNT OF A PRIMARY CATALYTALYTIC MATERIAL SELECTED FROM THE GROUP OF CSVO3 OR RBVO3, A PROMOTER, AND A CARRIER MATERIAL COMPRISING DIATOMACEOUS EARTH; AND THEN DRYING THE MIXTURE TO PROVIDE THE CATALYST.
Inventors
- 👤 A Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:38
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8603; B01D53/8609; B01D53/46; B01D53/48; B01D53/50; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C; C01; C01B; C01B17/00; C01B17/69; C01B17/74; C01B17/76; C01B17/78; C01B17/79
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |