US2587666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxidation of aromatic compounds containing oxygenated side chains
Assignee: California Research LLC
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Filing: 1950-06-17
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Granted: 1952-03-04
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Expires: 1970-06-17
Abstract
No abstract record available.
Inventors
- 👤 Jr William G Toland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:36
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/16; C07C51/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR PRODUCING AROMATIC CARBOXYLIC ACIDS AND SALTS OF AROMATIC CARBOXYLIC ACIDS HAVING THE CARBOXYL CARBON ATOM DIRECTLY ATTACHED TO A NUCLEAR CARBON ATOM WHICH COMPRISES OXIDIZING AN OXYGEN-CONTAINING PRODUCT OF THE PARTIAL OXIDATION OF AN ALKYL AROMATIC HYDROCARBON BY CONTACTING SAID PRODUCT WITH AN AQUEOUS MIXTURE OF A BASIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND THEIR SALTS WITH WEAK INORGANIC ACIDS, ALKALINE EARTH METAL HYDROXIDES AND THEIR SALTS WITH WEAK INORGANIC ACIDS, AND AN INORGANIC SULFUROUS MATERIAL CONTAINING SULFUR ATOMS AT A VALENCE LEVEL BELOW PLUS SIX AND ABOVE MINUS 2 AT A TEMPERATURE ABOVE ABOUT 550* F.
Claim 2
Dependent Claim
105 words
A PROCESS FOR PRODUCING AROMATIC CARBOXYLIC ACIDS AND SALTS OF AROMATIC CARBOXYLIC ACIDS HAVING THE CARBOXYL CARBON ATOM DIRECTLY ATTACHED TO A NUCLEAR CARBON ATOM WHICH COMPRISES OXIDIZING AN OXYGEN-CONTAINING PRODUCT OF THE PARTIAL OXIDATION OF AN ALKYL AROMATIC HYDROCARBON BY CONTACTING SAID PRODUCT WITH AN AQUEOUS MIXTURE OF A BASIC MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND THEIR SALTS WITH WEAK INORGANIC ACIDS, ALKALINE EARTH METAL HYDROXIDES AND THEIR SALTS WITH WEAK INORGANIC ACIDS, AND AN INORGANIC SULFUROUS MATERIAL CONTAINING SULFUR ATOMS AT A VALENCE LEVEL BELOW PLUS SIX AND ABOVE MINUS 2 AT A TEMPERATURE ABOVE ABOUT 550* F.
References Cited (Backward Citations)
DE364442C
Cited
US2470876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |