US3671529A
Expired / Lapsed
US
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Basic anthraquinone dyes, with pyridinium 2- or 4-dimethylene group
Assignee: Sandoz AG
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Filing: 1969-08-20
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Granted: 1972-06-20
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Expires: 1989-08-20
Abstract
Abstract Basic anthraquinone dyes free from sulphonic acid groups produced with a vinylpyridine group which are highly suitable for dyeing and printing acrylonitrile polymers or copolymers.
Inventors
- 👤 Rudolf Altermatt
- 👤 Roland Entschel
- 👤 Curt Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:44
CPC Classifications
C; C09; C09B; C09B1/00; C09B1/002
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
12 words
Basic anthraquinone dye according to claim 1 wherein the dimethylenepyridinium is 2-dimethylene-N-methylpyridinium.
Claim 2
Dependent Claim
12 words
Basic anthraquinone dye according to claim 1 wherein the dimethylenepyridinium is 4-dimethylene-N-methylpyridinium.
Claim 3
Dependent Claim
22 words
Basic Alpha -aminoanthraquinone dye according to claim 1 wherein the Alpha -amino nitrogen is bound directly to the dimethylene of the dimethylenepyridinium.
Claim 4
Dependent Claim
34 words
Basic dye according to claim 4 substituted in the 1-position by a member selected from the group consisting of methylamino, anilino, chloroanilino, cyclohexylamino and hydroxy and in the 4-position by said Alpha -amino nitrogen.
Claim 5
Dependent Claim
15 words
Basic anthraquinone dye of claim 1 free from sulphonic acid groups and of the formula
Claim 6
Dependent Claim
10 words
Basic anthraquinone dye of claim 6 wherein R11 is -H.
Claim 7
Dependent Claim
14 words
Basic anthraquinone dye of claim 7 wherein each of R13 and R14 is -H.
Claim 8
Dependent Claim
12 words
The basic anthraquinone dye according to claim 5 and of the formula
Claim 9
Dependent Claim
12 words
The basic anthraquinone dye according to claim 5 and of the formula
Claim 10
Dependent Claim
12 words
The basic anthraquinone dye according to claim 5 and of the formula
Claim 11
Dependent Claim
12 words
The basic anthraquinone dye according to claim 5 and of the formula
Claim 12
Dependent Claim
12 words
The basic anthraquinone dye according to claim 5 and of the formula
References Cited (Backward Citations)
US3431285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |