US3290389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of ortho-substituted phenols
Assignee: Bayer AG
•
Filing: 1962-01-18
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Granted: 1966-12-06
•
Expires: 1982-01-18
Abstract
No abstract record available.
Inventors
- 👤 Hahn Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:22
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/14; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
PROCESS FOR THE PRODUCTION OF PHENOLS ALKYLATED IN ORTHO-POSITION TO THE HYDROXYL GROUP WHICH COMPRISES REACTING PHENOL AND AN OLEFIN IN LIQUID PHASE IN THE PRESENCE OF GAMMA-ALUMINUM OXIDE AS CATALYST, AND RECOVERING THE REACTION PRODUCT.
Claim 2
Dependent Claim
36 words
PROCESS FOR THE PRODUCTION OF PHENOLS ALKYLATED IN ORTHO-POSITION TO THE HYDROXYL GROUP WHICH COMPRISES REACTING PHENOL AND AN OLEFIN IN LIQUID PHASE IN THE PRESENCE OF GAMMA-ALUMINUM OXIDE AS CATALYST, AND RECOVERING THE REACTION PRODUCT.
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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |