US3684738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of deactivated zeolite catalysts
Assignee: Mobil Oil AS
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Filing: 1970-03-16
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Granted: 1972-08-15
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Expires: 1990-03-16
Abstract
Abstract CRYSTALLINE ALUMINOSILICATE CATALYSTS CHARACTERIZED BY A SILICA TO ALUMINA MOLE RATIO OF GREATER THAN ABOUT 6 AND A PORE SIZE RANGING FROM ABOUT 5 TO ABOUT 13 ANGSTROM UNITS LOSE THEIR ACTIVITY AFTER CONSIDERABLE USE IN HYDROCARBON CONVERSION REACTIONS AND ARE REGENERATED BY CONTACT, UNDER PARTICULARLY DEFINED CONDITIONS, WITH A SOURCE OF HYDROGEN IONS OR HYDROGEN ION PRECURSORS.
Inventors
- 👤 Nai Y Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:22
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/30; B01J20/34; B01J20/3408; B01J29/00; B01J29/90
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |