US3201402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monocyclic carbocyclic aromatic amine
Assignee: Sandoz AG
•
Filing: 1959-07-21
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Granted: 1965-08-17
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Expires: 1979-07-21
Abstract
No abstract record available.
Inventors
- 👤 Bohler Hans
- 👤 Kehrer Fritz
- 👤 Maderni Piero
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:59
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/32; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3437; C09B48/00; C09B56/00; C07; C07C; C07C2603/00; C07C2603/02; C07C2603/40; C07C2603/42; C07C2603/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
3 words
2,5-DI-(2''-NITRO)-PHENYLAMINO TEREPHTHALIC ACID.
Claim 2
Dependent Claim
5 words
SYMMETRICAL QUINACRIDINE-7,14-DIONE OF THE FORMULA:
Claim 3
Dependent Claim
240 words
IN THE PREPARATION OF DI-ARYLAMINO-TEREPHTHALIC ACID COMPOUND, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY OF (I) REACTING, AT A TEMPERATURE BETWEEN 70* AND 160*C. AND WITH A PH RANGE OF FROM 2 TO 12 IN CONTACT WITH (A) COPPER CATALYST, (B) ACID-BINDING AGENT, AND (C) POLAR SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER, LOW MOLECULAR ALCOHOL OF FROM 1 TO 4 CARBON ATOMS, GLYCERINE, ETHYLENE GLYCOL, PROPYLENE GLYCOL AND POLYETHYLENE GLYCOL, (1) ONE MOLE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A 2,5-DIHALOGENOTEREPHTHALIC ACID AND A 2,5DIHALOGENOTEREPHTHALIC ACID ESTER WITH (2) ONE MOLE OF A MONOCYCLIC CARBOCYCLIC AROMATIC AMINE, WHEREIN FROM 1 TO 2 OF THE POSITIONS ORTHO TO THE AMINO GROUP ARE FREE, WHEREBY A MONOHALOGENO-MONOARYLAMINO-TEREPHTHALIC ACID COMPOUND IS OBTAINED, AND (II) REACTING, AT A TEMPERATURE BETWEEN 70* AND 160*C. AND WITHIN A PH RANGE OF FROM 2 TO 12 IN CONTACT WITH (A) COPPER CATALYST, (B) ACID-BINDING AGENT AND (C) POLAR SOLVENT SELECTED FROM THE GROUP CONSISTING OF WATER, LOW MOLECULAR ALCOHOL OF FROM 1 TO 4 CARBON ATOMS, GLYCERINE, ETHYLENE GLYCOL, PROPYLENE GLYCOL AND POLYETHYLENE GLYCOL, (3) ONE MOLE OF SAID MONOHALOGENO-MONOARYLAMINO-TEREPHTHALIC ACID COMPOUND WITH (4) ONE MOLE OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF (A) THE SAME AROMATIC AMINE AS EMPLOYED IN STEP I, (B) ANOTHER MONOCYCLIC CARBOCYCLIC AROMATIC AMINE WHEREIN FROM 1 TO 2 OF THE POSITIONS ORTHO TO THE AMINO GROUP ARE FREE, AND (C) A MIXTURE OF SAID AROMATIC AMINES.
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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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |