US3558592A
Expired / Lapsed
US
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Phenyl-azo-naphthol dyes
Assignee: BASF Schweiz AG
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Filing: 1967-12-12
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Granted: 1971-01-26
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Expires: 1987-12-12
Abstract
Abstract THE INVENTION RELATES TO MONOAZO DYESTUFFS WHICH, IN THE FORM OF THE FREE ACID, CORRESPOND TO THE FORMULA 2-((2-(HO3S-),(X-NH-)PHENYL)-N=N-),3-(HO3S-),5,6-DI(Y-), 8-(Z-NH-)NAPHTH-1-OL IN WHICH ONE OF THE SYMBOLS Y RESPRESENTS A HYDROGEN ATOM AND THE OTHER SYMBOL Y REPRESENTS A SULPHONIC ACID GROUP Z REPESENTS AN ACYL GROUPING AND X REPRESENTS AN A-BROMACRYLIC GROUPING, AN AB,-DIBROMOPROPIONYL GROUPING, A MONO- OR DINITROCHLOROHBENZOYL OR A MONO- OR DINITROBENZENESULPHONYL GROUPING.
Inventors
- 👤 Rene De Montmollin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:20
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/0064; C09B31/00; C09B31/02; C09B31/04; C09B62/44; C09B62/465; C09B62/47; C09B62/473; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |