US4251441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pigments of mixtures of methoxynitrobenzene-azo-methoxy-acetanilides
Assignee: Hoechst AG
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Filing: 1979-05-07
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Granted: 1981-02-17
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Expires: 1999-05-07
Abstract
Abstract Mixtures of monoazo compounds which are obtainable by diazotizing 0.75 to 0.85 molar equivalent of 5-nitro-2-amino-anisol and 0.25 to 0.15 molar equivalent of 3-nitro-4-amino-anisol and coupling onto 2-acetoacetylamino-anisol are pigments of high tinctorial strength, transparency, gloss and fastness to light having good rheological properties.
Inventors
- 👤 Heinrich Frolich
- 👤 Klaus Hunger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:20
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/32; C09B29/33; C09B29/335; C09B29/337
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
35 words
A composition of matter consisting essentially of 75 to 85% by weight of a first compound of the formula ##STR3## and of 25 to 15% by weight of a second compound of the formula ##STR4##
Claim 2
Dependent Claim
35 words
A composition of matter consisting essentially of 75 to 85% by weight of a first compound of the formula ##STR3## and of 25 to 15% by weight of a second compound of the formula ##STR4##
Claim 3
Dependent Claim
29 words
A composition as defined in claim 1, consisting of 75 to 85% by weight of the first compound and of 25 to 15% by weight of the second compound.
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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) | 1984-02-17 | 1984-08-18 | 1985-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-17 | 1988-08-18 | 1989-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-17 | 1992-08-18 | 1993-02-17 | $7700.00 | Window Closed / Lapsed |