US2649479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of nitro-amino-hydroxybenzenesulfonic acid amides
Assignee: BASF Schweiz AG
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Filing: 1952-02-04
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Granted: 1953-08-18
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Expires: 1972-02-04
Abstract
No abstract record available.
Inventors
- 👤 Zickendraht Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:40
CPC Classifications
C; C07; C07C; C07C311/00; C07C311/15
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A PROCESS FOR THE MANUFACTURE OF A NITROAMINO-HYDROXYBENZENE-SULFONIC ACID AMIDE WHICH COMPRISES HEATING ONE MOL OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2:4-DINITRO-1CHLOROBENZENE-6-SULFONIC ACID AMIDE, 2:4-DINITRO1-CHLOROBENZENE-6-SULFONIC ACID METHYL-AMIDE AND 2:4-DINITRO-1-CHLOROBENZENE-6-SULFONIC ACID PHENYL-AMIDE WITH AT LEAST TWO MOLS OF AN ALKALINE EARTH METAL HYDROXIDE, AND REDUCING THE NITRO GROUP BOUND IN THE 2-POSITION OF THE RESULTING PRODUCT TO AN AMINO GROUP BY MEANS OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL HYDROSULFIDES.
Claim 2
Dependent Claim
80 words
A PROCESS FOR THE MANUFACTURE OF A NITROAMINO-HYDROXYBENZENE-SULFONIC ACID AMIDE WHICH COMPRISES HEATING ONE MOL OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF 2:4-DINITRO-1CHLOROBENZENE-6-SULFONIC ACID AMIDE, 2:4-DINITRO1-CHLOROBENZENE-6-SULFONIC ACID METHYL-AMIDE AND 2:4-DINITRO-1-CHLOROBENZENE-6-SULFONIC ACID PHENYL-AMIDE WITH AT LEAST TWO MOLS OF AN ALKALINE EARTH METAL HYDROXIDE, AND REDUCING THE NITRO GROUP BOUND IN THE 2-POSITION OF THE RESULTING PRODUCT TO AN AMINO GROUP BY MEANS OF A REDUCING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL HYDROSULFIDES.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |