US2763667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of anthraquinone vat dyestuffs
Assignee: BASF Schweiz AG
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Filing: 1952-08-04
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Granted: 1956-09-18
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Expires: 1972-08-04
Abstract
No abstract record available.
Inventors
- 👤 Moergeli Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:47
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/36; C09B1/42; C09B1/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
PROCESS FOR THE MANUFACTURE OF ANTHRAQUINONE VAT DYESTUFFS, WHICH COMPRISES CONDENSING IN A FIRST STAGE 2 MOLECULAR PROPORTIONS OF 1:5-DIAMINO-ANTHRAQUINONE WITH AT LEAST 1 AND LESS THAN 2 MOLECULAR PROPORTIONS OF AN AROMATIC DICARBOXYLIC ACID DICHLORIDE, AND THEN ACYLATING THE SO OBTAINED PRODUCT WITH A FUNCTIONAL DERIVATIVE OF A MONOCARBOXYLIC ACID.
Claim 2
Dependent Claim
51 words
PROCESS FOR THE MANUFACTURE OF ANTHRAQUINONE VAT DYESTUFFS, WHICH COMPRISES CONDENSING IN A FIRST STAGE 2 MOLECULAR PROPORTIONS OF 1:5-DIAMINO-ANTHRAQUINONE WITH AT LEAST 1 AND LESS THAN 2 MOLECULAR PROPORTIONS OF AN AROMATIC DICARBOXYLIC ACID DICHLORIDE, AND THEN ACYLATING THE SO OBTAINED PRODUCT WITH A FUNCTIONAL DERIVATIVE OF A MONOCARBOXYLIC ACID.
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) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |