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US4542208A
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Disazo compounds for dyeing cellulosic fibers
Assignee: Nippon Kayaku Co Ltd
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Filing: 1983-10-06
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Granted: 1985-09-17
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Expires: 2003-10-06
Abstract
Abstract Water-soluble azo compounds which, in the free acid form, are represented by the formula: ##STR1## wherein one of X and Y is hydrogen and the other is --SO 3 H; one of A and B is hydrogen and the other is --SO 3 H; each of R 1 , R 2 , R 3 and R 4 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group or ureido group; and each of R 5 and R 6 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group, chlorine, hydroxyl group or carboxyl group, and a method for dyeing cellulose fibers, blended yarn fabrics of cellulose fibers with other kinds of fibers, particularly with polyester fibers, using the said compounds.
Inventors
- 👤 Junji Odani
- 👤 Shigeyuki Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:39
CPC Classifications
C; C09; C09B; C09B29/00; C09B43/00; C09B43/12; C09B43/136; C09B43/16; C09B29/0014; C09B29/06; C09B29/08; C09B29/0801; C09B29/0803; C09B43/32
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
A water-soluble azo compound which, in the free acid form, is represented by the following formula (1): ##STR38## wherein one of X and Y is hydrogen and the other is --SO 3 H; one of A and B is hydrogen and the other is --SO 3 H; each of R 1 , R 2 , R 3 and R 4 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group or ureido group; and each of R 5 and R 6 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group, chlorine, hydroxyl group or carboxyl group.
Claim 2
Dependent Claim
103 words
A water-soluble azo compound which, in the free acid form, is represented by the following formula (1): ##STR38## wherein one of X and Y is hydrogen and the other is --SO 3 H; one of A and B is hydrogen and the other is --SO 3 H; each of R 1 , R 2 , R 3 and R 4 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group or ureido group; and each of R 5 and R 6 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group, chlorine, hydroxyl group or carboxyl group.
Claim 3
Dependent Claim
45 words
A water-soluble azo compound according to claim 1 which, in the free acid form, is represented by the following formula: ##STR39## wherein each of R 2 and R 4 is independently hydrogen, methyl group, ethyl group, methoxy group, ethoxy group, acylamino group or ureido group.
Claim 4
Dependent Claim
17 words
A water-soluble azo compound according to claim 2 wherein R 2 and R 4 are methyl group.
Claim 5
Dependent Claim
19 words
A water-soluble azo compound according to claim 2 wherein R 2 is hydrogen and R 4 is methyl group.
Claim 6
Dependent Claim
33 words
A water-soluble azo compound according to claim 1 which, in the free acid form, is represented by the following formula: ##STR40## wherein R 2 and R 4 have the same meanings as above.
Claim 7
Dependent Claim
17 words
A water-soluble azo compound according to claim 5 wherein R 2 and R 4 are methyl group.
Claim 8
Dependent Claim
19 words
A water-soluble azo compound according to claim 5 wherein R 2 is hydrogen and R 4 is methyl group.
References Cited (Backward Citations)
JPS5284233A
Cited
US4337195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |