US2881219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of arylols
Assignee: Universal Oil Products Co
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Filing: 1956-05-15
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Granted: 1959-04-07
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Expires: 1976-05-15
Abstract
No abstract record available.
Inventors
- 👤 Ralph B Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/11; C07C37/18; C07C37/14; C07C37/16; C07C41/00; C07C41/01; C07C41/18; C07C41/30; C07C43/00; C07C43/02; C07C43/20; C07C43/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR THE ALKYLATION OF A NAPHTHOL CONTAINING FROM 1 TO 2 HYDROXYL GROUPS AND WHICH IS RELATIVELY INSOLUBLE IN LIQUID PHOSPHORIC ACID CATALYST WHICH COMPRISES ALKYLATING SAID NAPHTHOL WITH TERT-BUTYL ALCOHOL IN THE PRESENCE OF SAID CATALYST AND ACETIC ACID IN AN AMOUNT OF FROM ABOUT 10% TO ABOUT 100% BY WEIGHT OF THE PHOSPHORIC ACID, AND RECOVERING THE RESULTANT ALKYLATED NAPHTHOL.
Claim 2
Dependent Claim
13 words
THE PROCESS OF CLAIM 4 FURTHER CHARACTERIZED IN THAT SAID NAPHTHOL IS 5-METHOXY-1NAPHTHOL.
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) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |