US3966705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disulfo naphthalene containing fiber-reactive tetrazo dyes
Assignee: Novartis Corp
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Filing: 1974-12-12
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Granted: 1976-06-29
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Expires: 1994-12-12
Abstract
Abstract Fiber-reactive tetrazo dyes of the formula ##SPC1## Wherein each of D 1 and D 2 represents a benzene residue which contains at least one sulphonic acid group, one of the two substituents Y 1 and Y 2 represents the HO group and the other represents the H 2 N group, X represents a halogen atom and B represents a benzene residue which is devoid of sulphonic acid groups, are suitable dyes for dyeing and printing materials of the most diverse kind, especially for dyeing of cellulosic materials of fibrous structure by the exhaustion process. The dyes are characterized by increased reactivity and high degree of fixation.
Inventors
- 👤 Fritz Oesterlein
- 👤 Henri Riat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:45
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/043
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
67 words
A fibre-reactive tetraxo dye of the formula ##SPC11## wherein each of D 1 and D 2 represents mono- or di-sulfophenyl which is further unsubstituted or substituted by methyl, chloro, nitro or methoxy; one of Y 1 and Y 2 represents HO- and the other represent H 2 N; X represents halo; and B represents phenylene which is unsubstituted or substituted by chloro, methyl, ethyl, methoxy or ethoxy.
Claim 2
Dependent Claim
67 words
A fibre-reactive tetraxo dye of the formula ##SPC11## wherein each of D 1 and D 2 represents mono- or di-sulfophenyl which is further unsubstituted or substituted by methyl, chloro, nitro or methoxy; one of Y 1 and Y 2 represents HO- and the other represent H 2 N; X represents halo; and B represents phenylene which is unsubstituted or substituted by chloro, methyl, ethyl, methoxy or ethoxy.
Claim 3
Dependent Claim
12 words
A fibre-reactive tetrazo dye according to claim 1, of the formula ##SPC12##
Claim 4
Dependent Claim
12 words
A fibre-reactive tetrazo dye according to claim 2, of the formula ##SPC13##
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |