US2728796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol production
Assignee: Hercules Powder Co
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Filing: 1953-12-16
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Granted: 1955-12-27
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Expires: 1973-12-16
Abstract
No abstract record available.
Inventors
- 👤 Edwin J Vandenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:03
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE PROCESS OF PRODUCING A CRESOL WHICH COMPRISES CLEAVING AN OXIDIZED CYMENE OF THE GROUP CONSISTING OF M-AND P-CYMENE CONTAINING A MAJOR AMOUNT OF THE CORRESPONDING 8-HYDROPEROXCYMENE AND A MINOR AMOUNT OF THE CORRESPONDING 7-HYDROPEROXCYMENE AT A TEMPERATURE IN THE RANGE OF ABOUT 0* C. TO ABOUT 100* C. IN A SUBSTANTIALLY ANHYDROUS HOMOGENEOUS SOLUTION WITH A LOW MOLECULAR WEIGHT ALCOHOL HAVING 104 CARBON ATOMS AND 1-3 HYDROXYL GROUPS IN THE PRESENCE OF A CATALYST AMOUNT OF SULFURIC ACID.
Claim 2
Dependent Claim
79 words
THE PROCESS OF PRODUCING A CRESOL WHICH COMPRISES CLEAVING AN OXIDIZED CYMENE OF THE GROUP CONSISTING OF M-AND P-CYMENE CONTAINING A MAJOR AMOUNT OF THE CORRESPONDING 8-HYDROPEROXCYMENE AND A MINOR AMOUNT OF THE CORRESPONDING 7-HYDROPEROXCYMENE AT A TEMPERATURE IN THE RANGE OF ABOUT 0* C. TO ABOUT 100* C. IN A SUBSTANTIALLY ANHYDROUS HOMOGENEOUS SOLUTION WITH A LOW MOLECULAR WEIGHT ALCOHOL HAVING 104 CARBON ATOMS AND 1-3 HYDROXYL GROUPS IN THE PRESENCE OF A CATALYST AMOUNT OF SULFURIC ACID.
References Cited (Backward Citations)
US2628983A
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 |