Patent US3969494A successfully refreshed from Google Patents.
Patent US4314937A successfully refreshed from Google Patents.
US4314937A
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US
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1:2 Chromium unsymmetrical complexes of azo and disazo dyes
Assignee: BASF Corp
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Filing: 1980-03-07
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Granted: 1982-02-09
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Expires: 2000-03-07
Abstract
Abstract Chromium complex dyes of the formula ##STR1## wherein represents a halogen atom, a C 1 -C 5 -alkyl group, a C 1 -C 2 -alkoxy group, a nitro group, a C 2 -C 3 -alkanoylamino or C 2 -C 3 -alkoxycarbonylamino group, Me⊕ represents a cation, and Ar represents the radical of an aromatic or heterocyclic diazo component which carries one to three SO 3 H and/or COOH groups, preferably one to three SO 3 H groups or one SO 3 H and one COOH group, and is optionally further substituted by halogen, C 1 -C 5 -alkyl, C 1 -C 2 -alkoxy or nitro. These dyes are suitable for dyeing and printing nitrogen-containing material such as wool, silk, synthetic polyamide and especially leather.
Inventors
- 👤 Fabio Beffa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:56
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14; C09B45/16; C09B45/24; C09B45/26; D; D06; D06P; D06P1/00; D06P1/02; D06P1/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A chromium complex dye of the formula ##STR130## wherein X 1 is hydrogen, chloro, nitro or methyl; Me.sup.⊕ is a cation; and Ar is phenyl or naphthyl which is substituted by one or two --SO 3 H and is further unsubstituted or substituted by C 1 -C 5 alkyl, C 1 -C 2 alkoxy, chloro or nitro.
Claim 2
Dependent Claim
57 words
A chromium complex dye of the formula ##STR130## wherein X 1 is hydrogen, chloro, nitro or methyl; Me.sup.⊕ is a cation; and Ar is phenyl or naphthyl which is substituted by one or two --SO 3 H and is further unsubstituted or substituted by C 1 -C 5 alkyl, C 1 -C 2 alkoxy, chloro or nitro.
Claim 3
Dependent Claim
26 words
A chromium complex dye according to claim 1, wherein X is hydrogen and the NO 2 -group is in the para position to the azo group.
Claim 4
Dependent Claim
37 words
A chromium complex dye according to claim 1, wherein the NO 2 -group is in the ortho position to the oxygen atom and X 1 is nitro which is in the para position to the oxygen atom.
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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |