Enzymatic unhairing method

Patent 4636222 Issued on January 13, 1987. Estimated Expiration Date:

July 30, 2005. 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

2132579

Enzymatic bating method
Patent #: 3939040
Issued on: 02/17/1976
Inventor: Monsheimer , et al.

Environment-protecting method for the liming of raw hides Patent #: 4457759
Issued on: 07/03/1984
Inventor: Fekete , et al.

Inventors

Application

No. 06/760556 filed on 07/30/1985

US Classes:

8/94.16Depilating

Examiners

Primary: Lieberman, Paul
Assistant: McNally, John F.

International Classes

C14C 1/00 (20060101)
C14C 1/06 (20060101)

Foreign Application Priority Data

1984-08-07 DE

Abstract

An enzymatic method for the unhairing of hides and skins in the alkaline pH range by treating them in a liquor at a pH from 9 to 11 with a proteolytic enzyme having an optimum activity in the pH range from 2 to 7.5, and then unhairing.

Other References

The Enzymes, (Boyer, Editor), 3d Edn., vol. III, Academic Press, 1971, New York, p. 733
The Enzymes, (Boyer, Editor), 2d Edn., vol. 4, Academic Press, 1960, New York, p. 213
Keay, Process Biochemistry, Aug. 1971, p. 17
Uhlig, Biochemical Properties of Microbial Proteases, from Biochemistry and the Therapeutic Use of Digestive Enzymes, International Symposium Poertschach, Sep. 30, 1972, Stormarn-Verlag