US2729673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carboxylation of aromatic compounds
Assignee: EIDP Inc
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Filing: 1951-11-30
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Granted: 1956-01-03
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Expires: 1971-11-30
Abstract
No abstract record available.
Inventors
- 👤 William W Prichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
PROCESS FOR CARBOXYLATION OF AROMATIC CARBOCYCLIC COMPOUNDS WHICH COMPRISES REACTING IN THE PRESENCE OF CATALYTIC AMOUNTS OF NICKEL CARBONYL UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE OF CARBON MONOXIDE AND ABOVE 325* C. IN AN ATMOSPHERE OF CARBON MONOXIDE AN ALKANOIC ACID OF 2 TO 3 CARBONS, INCLUSIVE, AND AN AROMATIC CARBOCYLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED AROMATIC HYDROCARBONS AND ALKYL-, ALKOXY-, CARBOXY-, CARBALKOXY-, AND CARBONAMIDOSUBSTITUENT AROMATIC HYDROCARBONS HAVING AT MOST ONE SUBSTITUENT OTHER THAN ALKYL, SAID SUBSTUTUENT BEING AT TACHED DIRECTLY TO ANNULAR CARBON OF AN AROMATIC RING.
Claim 2
Dependent Claim
92 words
PROCESS FOR CARBOXYLATION OF AROMATIC CARBOCYCLIC COMPOUNDS WHICH COMPRISES REACTING IN THE PRESENCE OF CATALYTIC AMOUNTS OF NICKEL CARBONYL UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE OF CARBON MONOXIDE AND ABOVE 325* C. IN AN ATMOSPHERE OF CARBON MONOXIDE AN ALKANOIC ACID OF 2 TO 3 CARBONS, INCLUSIVE, AND AN AROMATIC CARBOCYLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED AROMATIC HYDROCARBONS AND ALKYL-, ALKOXY-, CARBOXY-, CARBALKOXY-, AND CARBONAMIDOSUBSTITUENT AROMATIC HYDROCARBONS HAVING AT MOST ONE SUBSTITUENT OTHER THAN ALKYL, SAID SUBSTUTUENT BEING AT TACHED DIRECTLY TO ANNULAR CARBON OF AN AROMATIC RING.
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) | 1959-01-02 | 1959-07-04 | 1960-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-02 | 1963-07-04 | 1964-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-02 | 1967-07-04 | 1968-01-03 | $7700.00 | Window Closed / Lapsed |