US2912428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of azo pigments
Assignee: BASF Schweiz AG
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Filing: 1957-03-04
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Granted: 1959-11-10
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Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Gaertner Hans
- 👤 Streiff Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:24
CPC Classifications
C; C09; C09B; C09B41/00; C09B33/00; C09B33/02; C09B33/147; C09B33/153; Y; Y10; Y10S; Y10S534/00; Y10S534/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR THE MANUFACTURE OF AN AZO PIGMENT FROM (A) A DIAZO COMPOUND WHICH IS FREE, FROM SULFONIC ACID GROUPS AND IS SELECTED FROM THE GROUP CONSISTING OF DIAZOBENZENES AND DIAZOANTHRAQUINONES, AND FROM (B) AN AZO COMPONENT WHICH IS ALSO FREE FROM SULFONIC ACID GROUPS AND CONTAINS FROM ONE TO TWO GROUPINGS CAPABLE OF COUPLING SELECTED FROM ACYLACETYLAMINE AND ORTHOHYDROXYARYL CARBOXYLIC ACID GROUPINGS, WHICH COMPRISES MECHANICALLY KNEADING AND THEREBY COUPLING THE DIAZO COMPOUND, IN A STABILIZED DEHYDRATED FORM, WITH THE AZO COMPONENT UNDER PRACTICALLY ANHYDROUS CONDITIONS IN SUBSTANTIALLY THE MINIUM QUANTITY OF AN ORGANIC SOLVENT NECESSARY TO MAINTAIN A KNEADABLE REACTION BATCH
Claim 2
Dependent Claim
103 words
A PROCESS FOR THE MANUFACTURE OF AN AZO PIGMENT FROM (A) A DIAZO COMPOUND WHICH IS FREE, FROM SULFONIC ACID GROUPS AND IS SELECTED FROM THE GROUP CONSISTING OF DIAZOBENZENES AND DIAZOANTHRAQUINONES, AND FROM (B) AN AZO COMPONENT WHICH IS ALSO FREE FROM SULFONIC ACID GROUPS AND CONTAINS FROM ONE TO TWO GROUPINGS CAPABLE OF COUPLING SELECTED FROM ACYLACETYLAMINE AND ORTHOHYDROXYARYL CARBOXYLIC ACID GROUPINGS, WHICH COMPRISES MECHANICALLY KNEADING AND THEREBY COUPLING THE DIAZO COMPOUND, IN A STABILIZED DEHYDRATED FORM, WITH THE AZO COMPONENT UNDER PRACTICALLY ANHYDROUS CONDITIONS IN SUBSTANTIALLY THE MINIUM QUANTITY OF AN ORGANIC SOLVENT NECESSARY TO MAINTAIN A KNEADABLE REACTION BATCH
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) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |