Patent US4488992A successfully refreshed from Google Patents.
US4488992A
Expired / Lapsed
US
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Monoazo dyestuffs derived from benzothiazole
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1979-12-06
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Granted: 1984-12-18
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Expires: 1999-12-06
Abstract
Abstract A disperse dye of the formula, <IMAGE> wherein R1 is an alkyl group having 5 to 6 carbon atoms, R2 is an alkyl group having 5 to 6 carbon atoms, a cyano-ethyl group, R3 is a hydrogen atom or a lower alkyl, amino or phenyl group, and Y1 and Y2 represent independently a hydrogen atom, a lower alkyl group, a lower alkoxy group, a halogen atom, a nitro group, a cyano group, a thiocyanate group or an alkylsulfonyl group, provided that both Y1 and Y2 are not hydrogen at the same time and Y1 is located at the 4- or 5-position, which is useful for dyeing hydrophobic fibers in brilliant red to violet shade with good fastnesses.
Inventors
- 👤 Kenji Yoshinaga
- 👤 Kiyoyasu Hashimoto
- 👤 Tetsuo Okaniwa
- 👤 Hirohito Kenmochi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:42
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0805; C09B29/0807; C09B29/0809; C09B29/0025; C09B29/0074; C09B29/0077; C09B29/0085; C09B29/0088
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
52 words
A disperse dye of the formula (I): ##STR13## wherein R 1 is an alkyl group having 5 to 6 carbon atoms, R 2 is a cyanoethyl group, R 3 is a lower alkyl group, Y 1 is a hydrogen atom at the 4- or 5-position, and Y 2 is a halogen atom.
Claim 2
Dependent Claim
52 words
A disperse dye of the formula (I): ##STR13## wherein R 1 is an alkyl group having 5 to 6 carbon atoms, R 2 is a cyanoethyl group, R 3 is a lower alkyl group, Y 1 is a hydrogen atom at the 4- or 5-position, and Y 2 is a halogen atom.
Claim 3
Dependent Claim
33 words
A disperse dye according to claim 1, wherein R 1 and R 2 in the formula (I) are a pentyl group and a cyanoethyl group, respectively, and R 3 is a methyl group.
Claim 4
Dependent Claim
7 words
A disperse dye of the formula: ##STR14##
Claim 5
Dependent Claim
7 words
A disperse dye of the formula: ##STR14##
References Cited (Backward Citations)
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US3639384A
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JPS5018780A
Cited
JPS5021029A
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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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |