Method for dehairing of hides or skins by means of enzymes

Patent 5834299 Issued on November 10, 1998. Estimated Expiration Date:

June 19, 2017. 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.

Abstract Claims Description Full Text

Patent References

3480433

Method for preparing tannable pelts from animal skins and hides
Patent #: 3986926
Issued on: 10/19/1976
Inventor: Monsheimer , et al.

Method for liming skins and hides Patent #: 4960428
Issued on: 10/02/1990
Inventor: Christner, et al.

Inventor

Andersen, Lars Peter

Assignee

Novo Nordisk A/S

Application

No. 878910 filed on 06/19/1997

US Classes:

435/265, Depilating hides, bating, or hide treating using enzyme or micro-organism8/94.18With organic material

Examiners

Primary: Redding, David A.

Attorney, Agent or Firm

Zelson; Steve T., Agris; Cheryl

Foreign Patent References

2 047 738 A GB 12/13/1980
WO 9406942 WO 03/13/1994
WO 9501425 WO 01/13/1995
WO 9500636 WO 01/13/1995

International Class

C14C 001/00

Foreign Application Priority Data

1994-12-21 DK

Abstract

The invention relates to an environmentally friendly method for dehairing of hides or skins by means of enzymes comprising the following steps: 1) the hides or skins are soaked, 2) the soaked hides or skins are subjected to a main soak, and 3) the thus treated hides or skins are dehaired by addition of water, exposure to mechanical influence and subjection to at least one protease, characterized in that the hides or skins are subjected to at least one protein disulfide redox agent at least one time during step 1) to 3).