Process to separate and recover the solid and liquid phases from treatment baths of hides and skins
Patent 3997290 Issued on December 14, 1976. Estimated Expiration Date: 
December 14, 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.
December 14, 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 2516806 3194865 3741722 InventorApplicationNo. 569642 filed on 04/21/1975US Classes:8/94.16, Depilating8/94.15, Treatment of untanned skins or hides8/94.17Alkaline material removalExaminersPrimary: Kight, III, JohnAttorney, Agent or FirmInternational ClassC14C 1/00 (20060101)Foreign Application Priority Data1974-05-06 MXAbstractThe present invention provides a process to separate and recover the solid and liquid phases from treatment baths of hides and skins. The solid phase contains valuable components used in a variety of industries providing a wide field of industrial applications. The liquid phase or treatment bath from hides and skins is practically used in indefinite forms to treat hides and skins and to prepare them for further tanning or preservation.Practically no part of the treatment bath from hides and skins is wasted, and this involves a great saving of water and chemical agents such as salts, bases and acids that take part in the preparation of hides and skins. Besides, the environment is not contaminated as these harmful waste waters are not disposed of and gases, such as hydrosulfuric acid, can be recuperated. | |
