US2551628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isomerization of phenols
Assignee: Beazer East Inc
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Filing: 1948-05-15
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Granted: 1951-05-08
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Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Nickels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:06
CPC Classifications
C; C07; C07C; C07C37/00; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
68 words
IN A PROCESS FOR CATALYTIC ISOMERIZATION, THE STEPS OF BRINGING AN ALKYL PHENOL FRACTION CONTAINING AT LEAST ONE ISOMERIZABLE ISOMER INTO CONTACT WITH A CATALYST COMPRISING AN ALUMINUM SALT OF A FLUORINE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROFLUORIC ACID PER SE AND HYDROFLUORIC ACID IN COMPLEX COMBINATION AS A WERNER COMPLEX AT A REACTIVE TEMPERATURE SUFFICIENT TO CONVERT A PORTION OF SAID ISOMER TO ANOTHER ISOMER.
Claim 2
Dependent Claim
68 words
IN A PROCESS FOR CATALYTIC ISOMERIZATION, THE STEPS OF BRINGING AN ALKYL PHENOL FRACTION CONTAINING AT LEAST ONE ISOMERIZABLE ISOMER INTO CONTACT WITH A CATALYST COMPRISING AN ALUMINUM SALT OF A FLUORINE ACID SELECTED FROM THE CLASS CONSISTING OF HYDROFLUORIC ACID PER SE AND HYDROFLUORIC ACID IN COMPLEX COMBINATION AS A WERNER COMPLEX AT A REACTIVE TEMPERATURE SUFFICIENT TO CONVERT A PORTION OF SAID ISOMER TO ANOTHER ISOMER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |