US3692698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroprocessing catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1970-12-28
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Granted: 1972-09-19
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Expires: 1990-12-28
Abstract
Abstract A HYDROPROCESSING CATALYST HAVING PREFERRED SURFACE AREA AND PORE VOLUME RANGES LOCATED IN PORES HAVING DIAMETERS RANGING FROM 30-80 A. AND GREATER THAN 2000 A. PORE VOLUME IN THE 200-2000 A. DIAMETER RANGE IS KEPT TO A MINIMUM. THE CATALYST IS A MIXTURE OF GROUP VI-B AND GROUP VIII METAL OXIDES OR SULFIDES ON AN ALUMINA SUPPORT. THE CATALYST SHOWS EXCEPTIONAL ACTIVITY MAINTENANCE IN HYDRODESULFURIZATION OF HEAVY HYDROCARBON FEED STOCKS CONTAINING ASPHALTENES. PORE VOLUME AND SURFACE AREA IS OBTAINED IN THE DESIRED RANGES BY FORMING THE COMPOSITE SUPPORT FROM CERTAIN SIZE RANGES OF PARTICLE-FORM SUPPORT MATERIAL.
Inventors
- 👤 Kenneth L Riley
- 👤 Willard H Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J35/61; B01J35/615; B01J35/63; B01J35/633; B01J35/64; B01J35/647; B01J35/651; B01J35/66; B01J35/69; C; C10; C10G; C10G2300/00; C10G2300/10; C10G2300/107
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |