Method for preparing tannable pelts from animal skins and hides
Patent 3966551 Issued on June 29, 1976. Estimated Expiration Date: 
June 29, 1993. 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 29, 1993. 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 2041731 2988488 InventorsAssigneeApplicationNo. 544794 filed on 01/28/1975US Classes:435/265Depilating hides, bating, or hide treating using enzyme or micro-organismExaminersPrimary: Monacell, A. LouisAssistant: Penland, R. B. Attorney, Agent or FirmInternational ClassC14C 1/00 (20060101)Foreign Application Priority Data1974-02-01 DTAbstractIn a process for the preparation of tannable pelts from animal skins or hides wherein concurrent soaking, unhairing, opening up of the hide structure, and bating are effected in a single procedural step by treatment with enzymes in an aqueous bath containing enzymes, the improvement wherein the enzymatic treating bath is free of amines and comprises dissolved therein:A. an effective amount of at least one member selected from the group consisting of a fungus protease whose optimum efficacy towards casein is at a pH above 7.0, trypsin, papain, and a bacterial protease whose optimum efficacy is at a pH between 6 and 9;B. an effective amount of a bacterial protease having an optimum efficacy against hemoglobin at a pH above 9; andC. an effective amount of thioglycolic acid or a salt thereof. |
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