US3677971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrotreating catalyst
Assignee: Chevron USA Inc
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Filing: 1970-03-09
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Granted: 1972-07-18
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Expires: 1990-03-09
Abstract
Abstract A CATALYST COMPRISING A LAYERED SYNTHETIC CRYSTALLINE ALUMINOSILICATE CRACKING COMPONENT, PREFERABLY SUBSTANTIALLY FREE OF ANY CATALYTIC METAL OR METALS, DISPERSED IN A GEL MATRIX COMPRISING ALUMINA, A GROUP VI HYDROGENATING COMPONENT AND A GROUP VIII HYDROGENATING COMPONENT, AND PROCESSES USING SAID CATALYST.
Inventors
- 👤 Robert J White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:13
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; B; B01; B01J; B01J21/00; B01J21/16; B01J29/00; B01J29/04; B01J29/049; B01J2229/00; B01J2229/30; B01J2229/42
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |