US2732408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
foote
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:22
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A PROCESS FOR PREPARING TERTIARY-OCTYLPHENOL WHICH COMPRISES REACTING SUBSTANTIALLY ANHYDROUS PHENOL WITH SUBSTANTIALLY ANHYDROUS DIISOBUTENE AT A TEMPERATURE FROM ABOUT 30 TO ABOUT 90* C. IN THE PRESENCE OF AN ACIDACTIVATED CLAY CHARACTERIZED BY A MOISTURE CONTENT OF FROM ABOUT 0.5 TO ABOUT 5% BY WEIGHT, REMOVABLE BY AZEOTRAPIC DISTILLATION WITH TOLUENE.
Claim 2
Dependent Claim
52 words
A PROCESS FOR PREPARING TERTIARY-OCTYLPHENOL WHICH COMPRISES REACTING SUBSTANTIALLY ANHYDROUS PHENOL WITH SUBSTANTIALLY ANHYDROUS DIISOBUTENE AT A TEMPERATURE FROM ABOUT 30 TO ABOUT 90* C. IN THE PRESENCE OF AN ACIDACTIVATED CLAY CHARACTERIZED BY A MOISTURE CONTENT OF FROM ABOUT 0.5 TO ABOUT 5% BY WEIGHT, REMOVABLE BY AZEOTRAPIC DISTILLATION WITH TOLUENE.
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) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |