US2749366A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aromatic carboxylic acid chlorides from aromatic compounds
Assignee: EIDP Inc
•
Filing: 1952-09-10
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Granted: 1956-06-05
•
Expires: 1972-09-10
Abstract
No abstract record available.
Inventors
- 👤 Robert E Foster
- 👤 Benjamin W Howk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:31
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/58
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR PREPARING AROMATIC CARBOXYLIC ACID CHLORIDES WHICH COMPRISES HEATING AND REACTING, AT A TEMPERATURE IN THE RANGE OF 100* TO 375* C., CARBON TETRACHLORIDE, A CARBOCYCLIC AROMATIC COMPOUND, FREE OF CARBOXYL GROUPS, CONTAINING FROM 1 TO 2 SIX-MEMBERED CARBOCYCLIC NECLEI AND HAVING AT LEAST ONE HYDROGEN ON THE AROMATIC NUCLEUS, AND A CARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC MONOCARBOXYLIC ACIDS AND CARBOCYCLIC AROMATIC CARBOXYLIC ACIDS OF 1 TO 2 CARBOXYL GROUPS, IN CONTACT WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF REDUCED TUNGSTIC OXIDE, NICKEL MOLYBDITE AND COPPER TUNGSTITE.
Claim 2
Dependent Claim
95 words
A PROCESS FOR PREPARING AROMATIC CARBOXYLIC ACID CHLORIDES WHICH COMPRISES HEATING AND REACTING, AT A TEMPERATURE IN THE RANGE OF 100* TO 375* C., CARBON TETRACHLORIDE, A CARBOCYCLIC AROMATIC COMPOUND, FREE OF CARBOXYL GROUPS, CONTAINING FROM 1 TO 2 SIX-MEMBERED CARBOCYCLIC NECLEI AND HAVING AT LEAST ONE HYDROGEN ON THE AROMATIC NUCLEUS, AND A CARBOXYLIC ACID SELECTED FROM THE CLASS CONSISTING OF ALIPHATIC MONOCARBOXYLIC ACIDS AND CARBOCYCLIC AROMATIC CARBOXYLIC ACIDS OF 1 TO 2 CARBOXYL GROUPS, IN CONTACT WITH A CATALYST SELECTED FROM THE CLASS CONSISTING OF REDUCED TUNGSTIC OXIDE, NICKEL MOLYBDITE AND COPPER TUNGSTITE.
References Cited (Backward Citations)
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Cited
US1963749A
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Cited
US2378048A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |