US4584367A
Expired / Lapsed
US
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Reactive disazo compound
Assignee: Nippon Kayaku Co Ltd
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Filing: 1982-08-06
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Granted: 1986-04-22
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Expires: 2002-08-06
Abstract
Abstract A novel reactive disazo dyestuff of which the free acid form is represented by the formula ##STR1## wherein R 1 represents hydrogen or carboxyl, R 1 and R 2 represent hydrogen or sulfo, either one of the R 2 and R 3 being hydrogen and the other being sulfo, and when R 1 is hydrogen, Y represents 2,5-dicarboxy-1,4-phenylene, 5-carboxyl-1,3-phenylene, or 2-carboxy-1,4-phenylene, and when R 1 is carboxyl, Y represents 1,4-phenylene, 1,3-phenylene, or 2-carboxy-1,4-phenylene which dye cellulosic fibers with excellent color-value and build-up property.
Inventors
- 👤 Tadashi Matsuo
- 👤 Yutaka Iizuka
- 👤 Koei Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:42
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
22 words
A reactive disazo compound which, in the free acid form, is represented by the formula ##STR19## wherein Y represents 2,5-dicarboxy-,4-phenylene, or 5-carboxy-1,3-phenylene.
Claim 2
Dependent Claim
22 words
A reactive disazo compound which, in the free acid form, is represented by the formula ##STR19## wherein Y represents 2,5-dicarboxy-,4-phenylene, or 5-carboxy-1,3-phenylene.
Claim 3
Dependent Claim
15 words
The reactive disazo compound of claim 1, which is represented by the following formula, ##STR20##
Claim 4
Dependent Claim
15 words
The reactive disazo compound of claim 1, which is represented by the following formula, ##STR21##
References Cited (Backward Citations)
US3647778A
Cited
JPS5360935A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |