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Patent US3723299A successfully refreshed from Google Patents.
US3723299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation process
Assignee: Sun Research and Development Co
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Filing: 1971-11-23
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Granted: 1973-03-27
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Expires: 1991-11-23
Abstract
Abstract THE PROCESS OF REDUCING THE NITROGEN CONTENT OF A MINERAL OIL CONTAINING AROMATIC HYDROCARBONS BY HYDROGENATING SAID OIL IN THE PRESENCE OF A CATALYST COMPRISED OF A Y-ZEOLITE CONTAINING COBALT PROMOTED WITH MANGANESE OR ZIRCONIUM.
Inventors
- 👤 W Seitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:03
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/44; C10G45/46; C10G45/54; C10G45/02; C10G45/04; C10G45/12
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |