US2671120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncatalytic isomerization of aromatic compounds
Assignee: Universal Oil Products Co
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Filing: 1950-04-28
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Granted: 1954-03-02
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Expires: 1970-04-28
Abstract
No abstract record available.
Inventors
- 👤 Vladimir N Ipatieff
- 👤 Kvetinskas Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:35
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/35; C07C17/358; C07C5/00; C07C5/22; C07C5/27; C07C5/2767
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A PROCESS WHICH COMPRISES SUBJECTING AN ALKYLBENZENE IN WHICH THE ALKYL GROUP CONTAINS MORE THAN TWO CARBON ATOMS TO THERMAL ISOMERIZATION AT A TEMPERATURE OF FROM ABOUT 400* TO ABOUT 525* C., A PRESSURE OF AT LEAST 3000 POUNDS PER SQUARE INCH AND AN HOURLY LIQUID SPACE VELOCITY OF FROM ABOUT 1.0 TO ABOUT 1.5.
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) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |