US3730875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination process for black oil conversion
Assignee: Universal Oil Products Co
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Filing: 1971-02-16
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Granted: 1973-05-01
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Expires: 1991-02-16
Abstract
Abstract A HYDROCARBONACEOUS BLACK OIL IS CONVERTED INTO LOWERBOILING HYDROCARBON PRODUCTS IN A COMBINATION PROCESS INVOLVING CATALYTIC HYDROGENATION, NON-CATALYTIC HYDROGENATIVE THERMAL CRACKING AND CATALYTIC HYDROCRACKING. D R A W I N G
Inventors
- 👤 W Gleim
- 👤 J Gatsis
- 👤 Hara M O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:28
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/22; C10G2300/00; C10G2300/10; C10G2300/107
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) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |