US3634332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for catalyst materials of improved pore volume
Assignee: Wyeth Holdings LLC
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Filing: 1969-09-02
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Granted: 1972-01-11
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Expires: 1989-09-02
Abstract
Abstract A PROCESS FOR PREPARING FORMED CATALYST SUPPORTS OF INCREASED PORE VOLUME WHICH COMPRISES FORMING A HYDROGEL OF A SUITABLE METAL OXIDE, PARTIALLY DRYING THE FORMED HYDROGEL TO FORM A XEROGEL, RESLURRYING THE XEROGEL IN SUFFICIENT WATER TO PRODUCE A CONTINUOUS WATER PHASE THEREIN, SUBJECTING THE SLURRY THUS FORMED TO SUFFICIENT SHEARING ACTION TO ELIMINATE THE FLUIDIZING EFFECT OF THE CONTINUOUS WATER PHASE, EXTRUDING THE STIFFENED XEROGEL SLURRY, AND THEREAFTER DRYING AND CALCINING THE EXTRUDATE. CATALYSTS MATERIALS ARE PRODUCED BY THE PREPARATIVE PROCESS DESCRIBED.
Inventors
- 👤 William Edward Bambrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:54
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; B01J37/00; B01J37/0009
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |