Patent US2728797A successfully refreshed from Google Patents.
US2728797A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cresol
Assignee: Hercules Powder Co
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Filing: 1954-06-10
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Granted: 1955-12-27
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Expires: 1974-06-10
Abstract
No abstract record available.
Inventors
- 👤 Leo J Filar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:30
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A METHOD OF CONVERTING A CYMENE OXIDATE CONTAINING AN 8-HYDROPEROXYCYMENE AS THE MAJOR HYDROPEROXIDE COMPONENT AND A 7-HYDROPEROXCYMENE AS THE MINOR HYDROPEROXIDE COMPONENT INTO A CRESOL SUBSTANTIALLY FREE OF ISOPROPYL PHENOL, WHCIH COMPRISES CONTACTING THE OXIDATE IN HOMOGENEOUS NONAQUEOUS SOLUTION WITH A CATALYTIC AMOUNT, IN THE RANGE OF 0.5% TO 2% OF THE HYDROPEROXIDE CONTENT OF THE OXIDATE, OF A METAL COMPOUND OF THE GROUP CONSISTING OF HYDROXIDES, OXIDES POTASSIUM, CALCIUM AND BARIUM, AND HYDROXIDES, OXIDES AND ORGANIC ACID SALTS OF HEAVY METALS AT A TEMPERATURE IN THE RANGE OF ABOUT 0* C. TO ABOUT 50* C. UNTIL THE TOTAL HYDROPEROXIDE CONTENT IS REDUCED BY AN AMOUNT IN THE RANGE OF 0.75 TO ABOUT 1.25 OF THE AMOUNT OF 7-HYDRROPEROXYCYMENE IN THE OXIDATE, AND SUBSTANTIALLY CONTACTING THE TREATED CYMENE OXIDATE WITH AN ACIDIC HYDROPEROXIDE CLEAVAGE CATALYST UNTIL TTHE REMAINING HYDROPEROXIDE CONTAINED THEREIN IS SUBSTANTIALLY COMPLETELY CONVERTED TTO THE CRESOL.
Claim 2
Independent Claim
149 words
A METHOD OF CONVERTING A CYMENE OXIDATE CONTAINING AN 8-HYDROPEROXYCYMENE AS THE MAJOR HYDROPEROXIDE COMPONENT AND A 7-HYDROPEROXCYMENE AS THE MINOR HYDROPEROXIDE COMPONENT INTO A CRESOL SUBSTANTIALLY FREE OF ISOPROPYL PHENOL, WHCIH COMPRISES CONTACTING THE OXIDATE IN HOMOGENEOUS NONAQUEOUS SOLUTION WITH A CATALYTIC AMOUNT, IN THE RANGE OF 0.5% TO 2% OF THE HYDROPEROXIDE CONTENT OF THE OXIDATE, OF A METAL COMPOUND OF THE GROUP CONSISTING OF HYDROXIDES, OXIDES POTASSIUM, CALCIUM AND BARIUM, AND HYDROXIDES, OXIDES AND ORGANIC ACID SALTS OF HEAVY METALS AT A TEMPERATURE IN THE RANGE OF ABOUT 0* C. TO ABOUT 50* C. UNTIL THE TOTAL HYDROPEROXIDE CONTENT IS REDUCED BY AN AMOUNT IN THE RANGE OF 0.75 TO ABOUT 1.25 OF THE AMOUNT OF 7-HYDRROPEROXYCYMENE IN THE OXIDATE, AND SUBSTANTIALLY CONTACTING THE TREATED CYMENE OXIDATE WITH AN ACIDIC HYDROPEROXIDE CLEAVAGE CATALYST UNTIL TTHE REMAINING HYDROPEROXIDE CONTAINED THEREIN IS SUBSTANTIALLY COMPLETELY CONVERTED TTO THE CRESOL.
References Cited (Backward Citations)
US2683751A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |