META-aminophenols useful as oxidation hair dye couplers
Patent 4976742 Issued on December 11, 1990. Estimated Expiration Date: 
May 6, 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.
May 6, 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 3591323 3893803 2-Amino-4-hydroxy-5-chloro toluene and the hydrochloride thereof 2-Methyl-5-N-hydroxyalkylaminophenol in an oxidation dye composition and method of using the same 2-Carbamylmethyl-or (diethylcarbamyl)methyl-amino-4-hydroxy toluene and process for preparing the same Patent #: 4101576 InventorsAssigneeApplicationNo. 191722 filed on 05/06/1988US Classes:8/412, With aminophenol dye8/421, Aminophenol dye564/442Halogen, bonded directly to carbon, containingExaminersPrimary: Hollrah, Glennon H.Assistant: Rand, Scott C. Attorney, Agent or FirmForeign Patent References
International ClassesA61K 007/13C07C 211/00 Foreign Application Priority Data1985-07-08 DEAbstractMeto-aminophenols of the formula ##STR1## where R is hydrogen, C1-4 -alkyl, or a C2-4 -hydroxyalkyl; and their use as couplers in an oxidative hair dye in combination with developers.Other References
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