US4474696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive disazo dyestuffs containing triazines
Assignee: Nippon Kayaku Co Ltd
•
Filing: 1980-06-03
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Granted: 1984-10-02
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Expires: 2000-06-03
Abstract
Abstract Reactive azo dyestuffs which, in the form of free acid, are represented by the following formula: <IMAGE> +TR <IMAGE> (wherein R is hydrogen or methyl) are characterized by exhibiting the following properties: high fixation efficiency, excellent wash-off, high build-up and excellent wet fastness. Such dyestuffs give dyeings excellent in light fastness, chlorine fastness and color yield.
Inventors
- 👤 Setsuzo Takahashi
- 👤 Hideo Inoue
- 👤 Hideo Otake
- 👤 Hiroshi Senoo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:47
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/043
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
24 words
A reactive azo dyestuff which, in the form of free acid, is represented by the following formula: ##STR33## wherein R is hydrogen or methyl.
Claim 2
Dependent Claim
24 words
A reactive azo dyestuff which, in the form of free acid, is represented by the following formula: ##STR33## wherein R is hydrogen or methyl.
Claim 3
Dependent Claim
35 words
A reactive azo dyestuff, according to claim 1, which, in the form of free acid, the sulfonic acids attached to the naphtalene nuclei are bonded to the nuclei at the position of 4,8-,5,7- or 6,8-.
Claim 4
Dependent Claim
22 words
According to claim 1 a reactive azo dyestuff which, in the form of free acid, is represented by the following formula; ##STR34##
Claim 5
Dependent Claim
22 words
According to claim 1 a reactive azo dyestuff which, in the form of free acid, is represented by the following formula; ##STR35##
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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |