Waterfast dye and aqueous ink
Patent 5198022 Issued on March 30, 1993. Estimated Expiration Date: 
January 17, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 17, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1365040 1913382 2112920 2193729 2227546 2265425 3891581 Disazo dyes having a 6-amino or substituted triazinylamino-1-hydroxynaphthalene-3-sulfonic acid coupling component radical Trisazo dyes having a 2,7-(1-amino-3,6-or 4,6-disulfo-8-hydroxynaphthylene) radical Disazo dyestuffs having an alkoxy group on the first and/or second component Inventors
AssigneeApplicationNo. 822251 filed on 01/17/1992US Classes:106/31.52, Plural acyclic azo group component containing106/31.49, Five-ring members in the heterocyclic ring347/100, Ink534/810, Containing -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.)534/811, Nitrogen single bonded directly to the -C(=X)- group (e.g., carboxamide, guanyl, etc.)534/812, Plural -C(=X)- groups containing534/815, Hydroxy bonded directly to a bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)534/829, Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)534/836, Additional hydroxy or nitrogen, other than as nitro, nitroso or azo, bonded directly to the bicyclo ring system534/837Sulfonic acid group bonded directly to the bicyclo ring system (-(0=)S(=0) OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal)ExaminersPrimary: Group, KarlAssistant: Klemanski, Helene Attorney, Agent or FirmForeign Patent References
International ClassC09D 011/02AbstractA alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an intense black at low concentration; and remains black on acid papers. The aqueous inks are stable and exhibit good printhead nozzle maintenance.Field of SearchExactly three azo groups attached indirectly to each other by nonionic bondingContaining -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.) Nitrogen single bonded directly to the -C(=X)- group (e.g., carboxamide, guanyl, etc.) Plural -C(=X)- groups containing Hydroxy bonded directly to a bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal) Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.) Additional hydroxy or nitrogen, other than as nitro, nitroso or azo, bonded directly to the bicyclo ring system Sulfonic acid group bonded directly to the bicyclo ring system (-(0=)S(=0) OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal) |
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