US2724722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of alpha-(o-aminoaryloxy)-fatty acids or their salts
Assignee: Novartis AG
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Filing: 1952-01-21
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Granted: 1955-11-22
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Expires: 1972-01-21
Abstract
No abstract record available.
Inventors
- 👤 Bossard Werner
- 👤 Gygax Andreas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:19
CPC Classifications
C; C07; C07D; C07D227/00; C07D227/02; C07D227/06; C07D227/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A PROCESS FOR THE MANUFACTURE OF AN ALKALI SALT OF AN A-(O-AMINOARYLOXY)-ALIPHATIC CARBOXYLIC ACID, WHICH COMPRISES REACTING (A) AN O-ALKOXYARYLAMIDE OF A LOWER A-HALOGEN ALIPHATIC CARBOXYLIC ACID, WHICH LOWER A-HALOGEN ALIPHATIC CARBOXYLIC ACID CONTAINS FROM TWO TO FOUR CARBON ATOMS, AND IN WHICH O-ALKOXYARYLAMIDE THE ALKOXY GROUP CONTAINS FROM ONE TO TWO CARBON ATOMS AND THE ARYL GROUP IS SELECTED FROM THE CLASS CONSISTING OF ARYL GROUPS OF THE BENZENE, DIPHENYL AND NAPHTHALENE SERIES, WITH (B) A FRIEDEL-CRAFTS CONDENSING AGENT AT A RAISED TEMPERATURE, WHEREBY ALKYL HALIDE SPLITS OFF, AND SAPONIFYING THE RESULTANT INTERMEDIATE PRODUCT WITH A STRONG ALKALI, WHEREBY THE CORRESPONDING ALKALI SALT OF THE A-(OAMINOARYLOXY)-ALIPHATIC CARBOXYLIC ACID IS PRODUCED.
Claim 2
Dependent Claim
111 words
A PROCESS FOR THE MANUFACTURE OF AN ALKALI SALT OF AN A-(O-AMINOARYLOXY)-ALIPHATIC CARBOXYLIC ACID, WHICH COMPRISES REACTING (A) AN O-ALKOXYARYLAMIDE OF A LOWER A-HALOGEN ALIPHATIC CARBOXYLIC ACID, WHICH LOWER A-HALOGEN ALIPHATIC CARBOXYLIC ACID CONTAINS FROM TWO TO FOUR CARBON ATOMS, AND IN WHICH O-ALKOXYARYLAMIDE THE ALKOXY GROUP CONTAINS FROM ONE TO TWO CARBON ATOMS AND THE ARYL GROUP IS SELECTED FROM THE CLASS CONSISTING OF ARYL GROUPS OF THE BENZENE, DIPHENYL AND NAPHTHALENE SERIES, WITH (B) A FRIEDEL-CRAFTS CONDENSING AGENT AT A RAISED TEMPERATURE, WHEREBY ALKYL HALIDE SPLITS OFF, AND SAPONIFYING THE RESULTANT INTERMEDIATE PRODUCT WITH A STRONG ALKALI, WHEREBY THE CORRESPONDING ALKALI SALT OF THE A-(OAMINOARYLOXY)-ALIPHATIC CARBOXYLIC ACID IS PRODUCED.
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) | 1958-11-21 | 1959-05-23 | 1959-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-21 | 1963-05-23 | 1963-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-21 | 1967-05-23 | 1967-11-22 | $7700.00 | Window Closed / Lapsed |