US3657154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microspherical zeolitic cracking catalyst
Assignee: BASF Catalysts LLC
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Filing: 1969-09-09
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Granted: 1972-04-18
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Expires: 1989-09-09
Abstract
Abstract A ZEOLITIC MOLECULAR SIEVE CRACKING CATALYST COMPOSITION IN THE FORM OF SMALL, HIGHLY ATTRITION-RESISTANT, ESSENTIALLY SPHERICAL PARTICLES (MICROSPHERES) IS COMPOSED OF ION-EXCHANGED SYNTHETIC CRYSTALLINE FAUJASITE AND AN ALKALI-LEACHED, ALUMINA-ENRICHED, SILICA-ALUMINA RESIDUE OF KAOLIN CLAY WHICH HAD PREVIOUSLY BEEN CALCINATED AT ELEVATED TEMPERATURE.
Inventors
- 👤 Walter L Haden Jr
- 👤 Frank J Dzierzanowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |