US3268437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocracking of nitrogen containing hydrocarbon oils for the preparation of middle oils
Assignee: Gulf Research and Development Co
•
Filing: 1963-08-29
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Granted: 1966-08-23
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Expires: 1983-08-29
Abstract
No abstract record available.
Inventors
- 👤 Beuther Harold
- 👤 Bruce K Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:00
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/10; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G69/00; C10G69/02; C10G69/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
THE HYDROCRACKING PROCESS FOR PREPARING A MIDDLE OIL WITHOUT SUBSTANTIALLY DEACTIVATING THE CATALYST WHICH COMPRISES SUBJECTING A FEED STOCK HAVING LESS THAN 5 PERCENT BY VOLUME OF COMPONENTS BOILING BELOW ABOUT 675*
References Cited (Backward Citations)
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US3078221A
Cited
US3099617A
Cited
US3145160A
Cited
US3172838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-22 | 1970-02-21 | 1970-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-22 | 1974-02-21 | 1974-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-22 | 1978-02-21 | 1978-08-23 | $7700.00 | Window Closed / Lapsed |