Process for making a persulfate-containing granulate for decolorizing or bleaching hair
Patent 5674476 Issued on October 7, 1997. Estimated Expiration Date: 
March 8, 2016. 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.
March 8, 2016. 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 3726967 Two component composition and method for bleaching hair Hair care composition in the form of a microemulsion Hair dye containing aminopyrazole derivatives as well as pyrazole derivatives Patent #: 5380340 InventorsAssigneeApplicationNo. 612533 filed on 03/08/1996US Classes:424/62, BLEACH FOR LIVE HAIR OR SKIN (E.G., PEROXIDES, ETC.)424/70.1, LIVE HAIR OR SCALP TREATING COMPOSITIONS (NONTHERAPEUTIC)424/501Contains solid synthetic resinExaminersPrimary: Venkat, JyothsnaAttorney, Agent or FirmForeign Patent References
International ClassA61K 007/135Foreign Application Priority Data1993-10-30 DEAbstractThe method of making a granulate composition for decolorizing or bleaching hair consists of preparing a powdery mixture consisting of from 30 to 65% by weight of one or more inorganic persulfates, from 1 to 20% by weight of a binding agent selected from the group consisting of polyvinylpyrrolidone and polyethylene glycols having molecular weights of 200 to 10,000; of 15 to 45% by weight of at least one salt selected from the group consisting of alkali metal carbonates, alkaline earth metal carbonates, alkali metal hydrogen carbonates, alkali metal silicates and from 0.1 to 3 percent by weight of a chelating agent, and one or more auxiliary and additive substance selected from the group consisting of perfume oils, hair dyes, amphoteric, anionic, cationic and nonionic surface-active substances and water-soluble thickeners; after making this powdery mixture, spraying ethanol and/or isopropanol in a weight ratio from 13:1 to 4:1 (powdery mixture to alcohol) into the powdery mixture to form a moistened mixture; granulating the moistened mixture formed during the spraying in a granulating apparatus to form a moist granulate; and after the granulating, drying the moist granulate to remove the alcohol or alcohols and to form the granulate composition. | |
