Compounds containing substituted phenylamino and pyridyl groups and hair dyeing preparations using them
Patent 4994087 Issued on February 19, 1991. Estimated Expiration Date: 
December 5, 2008. 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.
December 5, 2008. 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 3647351 Method of simultaneously producing chlorine dioxide and a sulfate salt Patent #: 3933988 InventorsAssigneeApplicationNo. 280109 filed on 12/05/1988US Classes:8/409, Heterocyclic amine dye8/408, Plural dyes or dye and coupling agent8/411, With metadiaminobenzene dye8/416, Aryldiamine dye8/423, Aminoheterocyclic dye546/304, Nitrogen attached directly to the six-membered hetero ring by nonionic bonding546/307, Plural nitrogens attached directly to the six-membered hetero ring by nonionic bonding546/311, The nitrogen bonded additionally only to hydrogen546/329, Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding546/334Chalcogen attached indirectly to the six-membered hetero ring by nonionic bondingExaminersPrimary: Ramsuer, Robert W.Assistant: Davis, Zinna Northington Attorney, Agent or FirmForeign Patent References
International ClassesA61K 007/13C07D 213/73 C07D 213/38 Foreign Application Priority Data1987-12-05 DEAbstractNovel compounds with structures corresponding to the formula: ##STR1## in which n=0 or 1 and R1 is hydrogen, a C1 -C4 alkyl or hydroxyalkyl group, or an amino group, and salts of such compounds, are superior to previously known couplers for oxidation hair dyes to produce a variety of colors, especially reds, when used with standard developer components. With 2,4,5,6-tetraaminopyrimidine developer for example, these novel compounds produce red to brown hair colors and, with p-tolylenediamine developer, red to blue-violet hair colors.Other References
Field of SearchNitrogen attached directly to the six-membered hetero ring by nonionic bondingNitrogen attached indirectly to the six-membered hetero ring by nonionic bonding Chalcogen attached indirectly to the six-membered hetero ring by nonionic bonding Plural nitrogens attached directly to the six-membered hetero ring by nonionic bonding The nitrogen bonded additionally only to hydrogen Nitrogen attached directly to the six-membered hetero ring by nonionic bonding Nitrogen attached indirectly to the six-membered hetero ring by nonionic bonding Plural dyes or dye and coupling agent Heterocyclic amine dye Aryldiamine dye Aminoheterocyclic dye With metadiaminobenzene dye |
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