Patent US4053462A successfully refreshed from Google Patents.
US4053462A
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Unsymmetrical phenyl azo naphthyl chromium complex dyes
Assignee: Novartis Corp
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Filing: 1976-08-04
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Granted: 1977-10-11
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Expires: 1996-08-04
Abstract
Abstract Chromium complex dyes which, in the form of their free acid, have the formula ##STR1## wherein one X represents the sulphonic acid group and the other X represents the nitro group, Y is a sulfone or sulfonamide group and Z is an acyl group. The dyes are suitable for dyeing natural and synthetic polyamides to produce dyeings which are level and have good fastness to light, perspiration, fulling, decatizing and carbonizing.
Inventors
- 👤 Fabio Beffa
- 👤 Gerhard Back
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:38
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16; D; D06; D06P; D06P1/00; D06P1/36; D06P3/00; D06P3/02; D06P3/04; D06P3/046; D06P3/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A chromium complex dye, which, in the form of its free acid, has the formula ##STR38## wherein one X is sulfo and the other X is nitro, Y is ##STR39## where R 1 and R 2 together with the nitrogen to which they are attached represent pyrrolidino, piperidino or morpholino; and Z is lower alkanoyl, lower alkoxycarbonyl, lower alkylsulfonyl, or is arylcarbonyl, aryloxycarbonyl or arylsulfonyl wherein "aryl" is phenyl or phenyl substituted by chloro, bromo, nitro, lower alkyl or lower alkoxy.
Claim 2
Dependent Claim
81 words
A chromium complex dye, which, in the form of its free acid, has the formula ##STR38## wherein one X is sulfo and the other X is nitro, Y is ##STR39## where R 1 and R 2 together with the nitrogen to which they are attached represent pyrrolidino, piperidino or morpholino; and Z is lower alkanoyl, lower alkoxycarbonyl, lower alkylsulfonyl, or is arylcarbonyl, aryloxycarbonyl or arylsulfonyl wherein "aryl" is phenyl or phenyl substituted by chloro, bromo, nitro, lower alkyl or lower alkoxy.
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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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |