US3794588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Highly-active supported catalysts
Assignee: EIDP Inc
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Filing: 1971-09-23
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Granted: 1974-02-26
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Expires: 1991-09-23
Abstract
Abstract HIGHLY-ACTIVE SUPPORTED CATALYST ARE PREPARED BY SLURRYING A FINELY DIVIDED FORM OF THE CATALYTIC MATERIAL IN A SOLUTION OF THE NITRATE SALT OF THE METAL OF THE CATALYTIC MATERIAL, APPLYING THE SLURRY TO A SUPPORT, PARTICULARLY ONE HAVING A SMOOTH SURFACE, DRYING AND CALCINING. IN A PREFERRED ASPECT, THE SUPPORTED CATALYST ALSO CONTAINS INTERSEPERSANTS TO STABILIZE THE CATALYST FROM CRYSTAL GROWTH AT HIGH TEMPERATURES.
Inventors
- 👤 A Stiles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:13
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/02; B01J37/0215; B01D; B01D53/00; B01D53/34; B01D53/74; B01D53/86; B01D53/8643; B01D53/8656; B01J23/00; B01J23/16; B01J23/32; B01J23/34; B01J23/38; B01J23/54; B01J23/66; B01J23/70; B01J23/74; B01J23/75; B01J23/755; B01J23/76; B01J23/80; B01J37/0225; B01J37/0226; B01J37/03
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |