Method for preparing tannable pelts from animal skins and hides
Patent 3986926 Issued on October 19, 1976. Estimated Expiration Date: 
October 19, 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.
October 19, 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. 432086 filed on 01/09/1974US Classes:435/265, Depilating hides, bating, or hide treating using enzyme or micro-organism435/839, Bacillus subtilis435/915, Aspergillus flavus435/917Aspergillus nigerExaminersPrimary: Monacell, A. LouisAssistant: Penland, R. B. Attorney, Agent or FirmInternational ClassC14C 1/00 (20060101)Foreign Application Priority Data1973-01-13 DTAbstractA method for preparing tannable pelts from animal skins or hides, said method effecting concurrent softening, dehairing, opening of the hide structure, and bating in a single procedural step, which method comprises treating said skins or hides, free of preserving salt, with an aqueous bath having a pH between about 9 and about 12 and having 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, and which protease may be replaced in whole or in part by trypsin and/or papain and/or by a bacterial protease whose maximum efficacy lies at a pH from 6 to 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 a short-chained, primary or secondary aliphatic amine.Other References
|
| ||||||||||||||
