US4374768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disperse dyes from 5-amino-4-halo-3-methylisothiazoles
Assignee: Novartis Corp
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Filing: 1981-04-16
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Granted: 1983-02-22
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Expires: 2001-04-16
Abstract
Abstract Disclosed are monoazo dyes derived from diazotized 5-amino-4-halo-3-methylisothiazoles and m-acylaminoaniline couplers. These dyes impart scarlet and red shades on nylon and polyester fibers and exhibit good fastness properties. The dyes are represented by the general formula: <IMAGE> wherein R1 and R2 are each selected from lower alkyl, cycloalkyl, substituted cycloalkyl, or lower alkyl substituted with phenyl, cyano, sulfonamido, carboxamido, alkoxy, hydroxy, or an imide radical; R3 is lower alkyl, lower alkyl substituted as above, phenyl, or trifluoromethyl; and X is chlorine or bromine.
Inventors
- 👤 Jean C. Fleischer
- 👤 Gary T. Clark
- 👤 Ronald J. Maner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025; C09B29/0074; C09B29/0077; C09B29/0081
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
87 words
Monoazo dyes of the general formula: ##STR14## wherein R 1 and R 2 are each selected from lower alkyl, cyclohexyl, and alkyl substituted with carbamoyl, sulfamoyl, --CN, phenyl, succinimido, --N(SO 2 CH 3 )CH 2 C 6 H 5 , lower alkoxy, lower alkoxyalkoxy, lower alkanoylamino, hydroxy substituted lower alkoxy, hydroxy, phthalimido, ##STR15## and wherein only one of R 1 , and R 2 can be unsubstituted alkyl; R 3 is lower alkyl, lower alkyl substituted as above, phenyl, or trifluoromethyl; and X is chlorine or bromine.
Claim 2
Dependent Claim
87 words
Monoazo dyes of the general formula: ##STR14## wherein R 1 and R 2 are each selected from lower alkyl, cyclohexyl, and alkyl substituted with carbamoyl, sulfamoyl, --CN, phenyl, succinimido, --N(SO 2 CH 3 )CH 2 C 6 H 5 , lower alkoxy, lower alkoxyalkoxy, lower alkanoylamino, hydroxy substituted lower alkoxy, hydroxy, phthalimido, ##STR15## and wherein only one of R 1 , and R 2 can be unsubstituted alkyl; R 3 is lower alkyl, lower alkyl substituted as above, phenyl, or trifluoromethyl; and X is chlorine or bromine.
Claim 3
Dependent Claim
16 words
A compound according to claim 1 of the formula ##STR16## where X is chlorine or bromine.
Claim 4
Dependent Claim
16 words
A compound according to claim 1 of the formula ##STR17## where X is chlorine or bromine.
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) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |