US2516152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for isomerizing para alkyl phenols to ortho alkyl phenols
Assignee: Phillips Petroleum Co
•
Filing: 1946-03-26
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Granted: 1950-07-25
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Expires: 1966-03-26
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 John E Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:10
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR THE FORMATION OF AN ORTHOALKYL PHENOL WHICH COMPRISES SUBJECTING A PARAALKYL PHENOL TO ISOMERIZATION IN THE PRESENCE OF A CATALYST COMPRISING A SILICA GEL ACTIVATED BY IMPREGNATION WITH A MINOR PROPORTION OF ALUMINA, AT A TEMPERATURE WITHIN THE RANGE OF 200 TO 550* F. AND A PRESSURE WITHIN THE RANGE OF 100 TO 1000 POUNDS PER SQUARE INCH SUFFICIENT TO MAINTAIN A LIQUID PHASE.
Claim 2
Dependent Claim
67 words
A PROCESS FOR THE FORMATION OF AN ORTHOALKYL PHENOL WHICH COMPRISES SUBJECTING A PARAALKYL PHENOL TO ISOMERIZATION IN THE PRESENCE OF A CATALYST COMPRISING A SILICA GEL ACTIVATED BY IMPREGNATION WITH A MINOR PROPORTION OF ALUMINA, AT A TEMPERATURE WITHIN THE RANGE OF 200 TO 550* F. AND A PRESSURE WITHIN THE RANGE OF 100 TO 1000 POUNDS PER SQUARE INCH SUFFICIENT TO MAINTAIN A LIQUID PHASE.
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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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |