US3207688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocracking process in two stages employing finely divided catalyst particles
Assignee: Cities Service Research and Development Co
•
Filing: 1962-06-13
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Granted: 1965-09-21
•
Expires: 1982-06-13
Abstract
No abstract record available.
Inventors
- 👤 Roger P Van Driesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:45
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3124518A
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US2717865A
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US2909476A
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US2987465A
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US3050450A
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US3023158A
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US3151057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |