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US3524808A
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Hydrocracking catalyst containing carrier treated with a solution of nh4f in hno3
Assignee: Shell USA Inc
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Filing: 1968-02-06
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Granted: 1970-08-18
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Expires: 1988-02-06
Abstract
No abstract record available.
Inventors
- 👤 Willem C J Quik
- 👤 Pieter A Van Weeren
- 👤 Herman W Kouwenhoven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:20
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J27/00; B01J27/06; B01J27/128; B01J27/13; C10G47/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |