Keratin hydrolyzate useful as hair fixatives
Patent 4279996 Issued on July 21, 1981. Estimated Expiration Date: 
September 25, 1999. 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.
September 25, 1999. 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 References3578461 InventorsAssigneeApplicationNo. 06/078850 filed on 09/25/1979US Classes:435/68.1, Enzymatic production of a protein or polypeptide (e.g., enzymatic hydrolysis, etc.)424/70.14, Protein or derivative435/272Proteinaceous material recovered or purifiedExaminersPrimary: Shapiro, Lionel M.Attorney, Agent or FirmInternational ClassesA61K 8/65 (20060101)A61K 8/96 (20060101) A61K 8/98 (20060101) A61K 8/30 (20060101) Foreign Application Priority Data1978-10-09 JPAbstractWater-soluble keratin hydrolyzate having at least two mercapto groups in one molecule and having an average molecular weight of 2,000 to 20,000, suitable for cosmetic application to the hair, particularly as hair fixatives. The hydrolyzate is prepared by reducing keratin in an aqueous solution of a reducing agent under alkaline conditions and subjecting the resulting reduction product to enzymatic hydrolysis.Other References
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