US3772383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing phenyl esters of aliphatic carboxylic acids
Assignee: Asahi Kasei Corp
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Filing: 1971-08-06
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Granted: 1973-11-13
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Expires: 1991-08-06
Abstract
Abstract PHENYL ESTERS OF ALIPHATIC CARBOXYLIC ACIDS WHICH ARE USEFUL AS THE MATERIAL FOR PREPARING PHENOLS OR OTHER DERIVATIVES, ARE PREPARED IN ONE STEP AND IN REMARKABLY HIGH YIELD FROM BENZENE OR LOWER ALKYL DERIVATIVES THEREOF, BY REACTING THEM WITH LOWER ALIPHATIC CARBOXYLIC ACIDS AND AMOLECULAR OXYGEN-CONTAINING GAS IN LIQUID PHASE AT AN ELEVATED TEMPERATURE IN THE PRESENCE OF NITRIC ACID, USING A CATALYST OF (I) PALLADIUM OR ITS COMPOUNDS, (II) AT LEAST ONE OF THE COMPOUNDS OF COPPER, ZINC, CADMIUM, URANIUM, TIN, LEAD, VANADIUM, ANTIMONY, BISMUTH, CHROMIUM, TELLURIUM, MANGANESE, IRON, COBALT, NICKEL OR THALLIUM, AND (III) AN ALKALI SALT OF FATTY ACID.
Inventors
- 👤 N Kominami
- 👤 N Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:55
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/04; C07C67/05; C07C67/055
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |