US3766164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 4-(2-nitroisobutylamino)-azobenzene
Assignee: Hoechst AG
•
Filing: 1970-11-16
•
Granted: 1973-10-16
•
Expires: 1990-11-16
Abstract
Abstract WATER-INSOLUBLE MONOAZO DYESTUFFS OF THE FORMULA 1-(D-N=N-),2-Y,4-(O2N-C(-CH3)2-CH2-N(-R)-),5-Z-BENZENE WHEREIN D AS THE REST OF A DIAZO COMPONENT IS NITROPHENYLENE, CHLOROPHENYLENE, NITRO-CYANO-PHENYLENE, NITROCHLORO-PHENYLENE, NITROFLUOROMETHYL-PHENYLENE, DINITRO-TRIFLUORO-METHYL-PHENYLENE - DINITRO-CHLORO-PHENYLENE OR NITRO-DICHLORO-PHENYLENE, Y IS HYDROGEN, LOWER ALKYL, LOWER ALKOXY OR ACETYLAMINO, Z IS HYDROGEN, LOWER ALKYL OR LOWER ALKOXY AND R IS HYDROGEN OR LOWER ALKYL. THE DYESTUFFS ARE DISTINGUISHED BY A GOOD COLOR BUILD-UP AND ARE SUITABLE FOR DYEING AND PRINTING POLYESTER AND POLYESTER-CONTAINING FIBERS FAST TO LIGHT, WASHING AND THERMOFIXATION.
Inventors
- 👤 R Hahnle
- 👤 E Hoyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:16
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B62/00; C09B62/44; C09B62/503; C09B62/507; C09B62/513; Y; Y10; Y10S; Y10S8/00; Y10S8/933
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |