US3756940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simultaneous production of aromatic hydrocarbons and isobutanes
Assignee: Honeywell UOP LLC
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Filing: 1972-04-18
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Granted: 1973-09-04
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Expires: 1992-04-18
Abstract
Abstract A NAPHTHA BOILING RANGE HYDROCARBON CHARGE STOCK IS CONVERTED INTO AROMATIC HYDROCARBONS AND AN ISOBUTANE CONCENTRATE VIA A COMBINATION PROCESS INVOLVING CATALYTIC REFORMING, SEPARATION AND HYDROCRACKING. THE CATALYTIC REFORMING IS EFFECTED IN TWO DISTINCT, INDIVIDUAL REFORMING REACTION ZONES, ONE OF WHICH OPERATES AT A RELATIVELY HIGH SEVERITY, AND THE SECOND OF WHICH OPERATES AT A RELATIVELY LOW SEVERITY. FOLLOWING SEPARATION OF AN AROMATIC CONCENTRATE, THE REMAINING SATURATED HYDROCARBONS ARE SUBJECTED TO A PARTICULAR HYDROCRACKING PROCESS WHICH RESULTS IN EXCEEDINGLY HIGH YIELDS OF ISOBUTANE.
Inventors
- 👤 G Donaldson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:16
CPC Classifications
C; C10; C10G; C10G61/00; C10G61/02; C10G61/06; C10G59/00; C10G59/02; C10G69/00; C10G69/02; C10G69/08; C10L; C10L1/00; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |