Patent US3821191A successfully refreshed from Google Patents.
US3821191A
Expired / Lapsed
US
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Azo pigments of the aminoanthraquinonylazo-hydroxynaphthoic acid series
Assignee: Individual
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Filing: 1971-12-02
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Granted: 1974-06-28
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Expires: 1991-12-02
Abstract
Abstract Azo pigments of the formula WHERE A is an aminoanthraquinone, R1 and R2 are substituents and B is hydrogen, alkyl, aralkyl, aryl or heteroaryl, which are useful for dope dyeing, for print pastes for printing, for production of colored surface coatings, for dyeing phenoplasts, aminoplasts or thermoplasts, for textile printing, and in high grade printing inks. These pigments are particularly suitable for coloring polyvinyl chloride, polyethylene or polypropylene with excellent fastness to light, migration and overcoating.
Inventors
- 👤 G Ruider
- 👤 P Dimroth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:54
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/32; C09B1/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
56 words
A dye as set forth in claim 1 in which R1 denotes hydrogen, chlorine, cyano, methyl or methoxy; R2 denotes hydrogen, chlorine, methyl or methoxy; and B denotes phenyl or naphthyl or phenyl or naphthyl substituted by chlorine, methyl, ethyl, methoxy, ethoxy, phenoxy, benzoyl, phenyl, carbomethoxy, carboethoxy, N-phenylsulfonamido or N-phenylcarbamoyl or a radical of the formula:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |