Patent US3598722A successfully refreshed from Google Patents.
US3598722A
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Catalytic hydroprocessing of a petroleum crude oil feedstock
Assignee: Union Carbide Corp
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Filing: 1969-03-10
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Granted: 1971-08-10
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Expires: 1989-03-10
Abstract
Abstract D R A W I N G A PETROLEUM CRUDE OIL FEEDSTOCK IS CATALYTICALLY HYDROPROCESSED INTO MORE VALUABLE PRODUCTS WHILE, SIMULTANEOUSLY, RECOVERY AND REUSE OF HYDROGEN IS ACHIEVED BY MEANS OF A COMBINATION PROCESS INCLUDING THE STEPS OF CATALYTIC HYDROPROCESSING, SEPARATION, HYDROGEN RECOVERY, AND FRACTIONATION.
Inventors
- 👤 Don B Carson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:01
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/22
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |