Hair relaxer composition and associated methods
Patent 5304370 Issued on April 19, 1994. Estimated Expiration Date: 
June 9, 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.
June 9, 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 ReferencesWater-in-oil emulsions of hydrophobe association polymers Compositions and methods for the treatment of hair Hair relaxer cream Conditioning hair relaxer system with conditioning activator Patent #: 5077042 InventorsAssigneeApplicationNo. 895951 filed on 06/09/1992US Classes:424/70.2, Permanent waving or straightening132/205, Including specified treatment interval424/70.19, Two or more designated surfactant containing424/70.31Nonionic surfactant containingExaminersPrimary: Page, Thurman K.Assistant: Gardner, Sally Attorney, Agent or FirmInternational ClassesA61K 007/09A61K 007/06 AbstractA hair relaxer composition comprising a mixture of:a) a base composition containing a water phase comprised of sodium hydroxide in water, and an oil phase, wherein the water phase is dispersed in the oil phase in the form of water in oil emulsion micelles,b) an additive composition comprised of a water in oil emulsionwhereby the mixture of (a) and (b) is an emulsion within an emulsion.Other References
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