US3776837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor fuel production process
Assignee: Shell USA Inc
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Filing: 1971-10-20
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Granted: 1973-12-04
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Expires: 1991-10-20
Abstract
Abstract HIGH AROMATIC CONTENT MOTOR FUEL IS PRODUCED FROM C5-C8+ NAPHTHA BY SEPARATING THE NAPHTHA INTO A C5-C6 CUT, A SEPARATE C7 CUT AND A C8+ CUT; CATALYTICALLY DEHYDROCYCLIZING THE C7 CUT; CATALYTICALLY REFORMING THE C8+ CUT; AND THEREAFTER COMBINING THE THREE FRACTIONS. IN PREFERRED MODES OF OPERATION, THE C7 CUT IS ALSO SUBJECTED TO CATALYTIC REFORMATION AND THE C5-C6 CUT IS ISOMERIZED BEFORE COMBINATION WITH THE OTHER HYDROCARBON FRACTIONS.
Inventors
- 👤 F Dautzenberg
- 👤 H Alkema
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
C; C10; C10G; C10G27/00; C10G59/00; C10L; C10L1/00; C10L1/04; C10L1/06
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |