US3555004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disazo pigments
Assignee: BASF Schweiz AG
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Filing: 1968-02-26
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Granted: 1971-01-12
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Expires: 1988-02-26
Abstract
Abstract DISAZO DYESTUFFS OF THE FORMULA Y-R2-NH-CO-R1(-OH)-N=N-A1-X-A2-N=N-R1(-OH)-CO-NH-R2-Y IN WHICH A1, A2 AD R2 EACH REPRESENTS AN ARYLENE RESIDUE, R1 REPRESENTS A NAHTHALENE RESIDUE IN THICH THE AZO, HYDROXY AND CARBOXYLIC ACID AMIDE GROUP ARE RESPECTIVELY IN 1,2,3-POSTION, X REPRESENTS A DIRECT BOND OR A BRIDGING GROUP AND Y REPRESENTS A GROUP OF THE FORMULA -NHCOR3 OR -CONHR4 IN WHICH R3 REPRESENTS A HYDROGEN ATOM OR AN ALKYL, ARYL, ALKOXY, AMINO, ALKYLAMINO OR ARYLAMINO GROUP AND R4 REPRESENTS A HYDROGEN ATOM OR AN ARYL GROUP ARE VALUABLE PIGMENTS WHICH COLOR PLASTIC MASSES IN VIOLET TO BLUE SHADES OF GOOD FASTNESS TO LIGHT AND MIGRATION.
Inventors
- 👤 Willy Mueller
- 👤 Karl Ronco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:50
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/021; C09B35/033
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |