US2598587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Di (1, 4 diamino-2-aryl ketone anthraquinone) amides of aromatic dicarboxylic acids
Assignee: BASF Schweiz AG
•
Filing: 1950-07-17
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Granted: 1952-05-27
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Expires: 1970-07-17
Abstract
No abstract record available.
Inventors
- 👤 Moergeli Eduard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
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
7 words
A VAT DYESTUFF OF THE GENERAL FORMULA
Claim 2
Dependent Claim
7 words
A VAT DYESTUFF OF THE GENERAL FORMULA
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |