Patents by Inventor Gertrud Wick

Gertrud Wick has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Auxiliary for liming and loosening hairs of animal skins
    Patent number: 6689172
    Abstract: The invention concerns an auxiliary for liming and loosening hairs of animal skins, containing, in aqueous solution: 10 to 50 wt. % of a polysaccharide solution; 5 to 25 wt. % of a mercapto-carboxylic acid or one of its salts; and 1 to 10 wt. % of a mercapto-alcohol or one of its alkaline salts. Said auxiliary is added during liming of animal skins, to the solution generally containing alkalis, inorganic sulphides or hydrosulphides and anionic or non-ionic surfactants, for standard production of sweatbands.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: February 10, 2004
    Assignee: Trumpler GmbH & Co. Chemische Fabrik
    Inventors: Thomas Feigel, Gertrud Wick, Peter Wohlmuth, Martin Heise
  • Stable enzymatic aqueous liquid composition for the production of leather
    Patent number: 5710040
    Abstract: An aqueous liquid composition containing one or more enzymatic active substances and at least 10 wt % to a maximum of (100-x) wt % molasses, wherein x is the fraction of enzymatic active substances in wt % and wherein x is a value from 0.001 to 90, which is useful for the production of leather in the beamhouse, to improve rehydration and dirt removal while soaking, to improve the loosening of hair and to inhibit swelling during liming, and to improve the cleaning of the surface of the skin during bating.
    Type: Grant
    Filed: February 13, 1996
    Date of Patent: January 20, 1998
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Juergen Christner, Gertrud Wick
  • Method for the enzymatic liming of skins and hides
    Patent number: 5525509
    Abstract: A method for preparing unhaired hides ready for tanning from hides and skins using proteolytic and lipolytic enzymes in the beamhouse, whereby in at least one of the partial steps of the beamhouse consisting of a) liming in the pH range 11.5-14 and b) bating in the pH range 5-11.5, alkaline lipases (E.C.3.1.3.) having an activity optimum in the pH range 9-11 are added to the aqueous floats corresponding to these partial steps.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: June 11, 1996
    Assignee: Rohm GmbH
    Inventors: Juergen Christner, Tilman Taeger, Gertrud Wick
  • Method for liming hides and skins
    Patent number: 5508195
    Abstract: A method for liming hides and skins using a proteolytic enzyme in an aqueous-alkaline float is taught, wherein the liming float has a pH value from 10-14 and contains both thiourea dioxide and an alkaline protease having elastase activity.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: April 16, 1996
    Assignee: Rohm GmbH
    Inventors: Juergen Christner, Tilman Taeger, Gertrud Wick
  • Tanning agent containing a dialdehyde
    Patent number: 5505864
    Abstract: Tanning agents containing an .omega.,.omega.-dialdehyde as as the active tanning substance, optionally in a deactivated form, in combination with a polymer containing hydroxyl groups, and methods for using such tanning agents in the preparation of leather, particularly in pickling, tanning, and retanning.
    Type: Grant
    Filed: December 14, 1993
    Date of Patent: April 9, 1996
    Assignee: Rohm GmbH
    Inventors: Harald Bauer, Juergen Christner, Gertrud Wick
  • Method of preparing leather from unhaired hides
    Patent number: 5492539
    Abstract: Tanning agents containing an .omega.,.omega.-dialdehyde as as the active tanning substance, optionally in a deactivated form, in combination with a polymer containing hydroxyl groups, and methods for using such tanning agents in the preparation of leather, particularly in pickling, tanning, and retanning.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: February 20, 1996
    Assignee: Rohm GmbH
    Inventors: Harald Bauer, Juergen Christner, Gertrud Wick
  • Method for the wet degreasing of hide and skin stock
    Patent number: 4968621
    Abstract: A method for the wet degreasing of raw hides and skins, pelts, and wet blues under the conditions of enzymatic bating, wherein enzymatic bating of the hide stock is carried out with proteolytic enzymes in the presence of synthetic surface active substances, for example, a mixture of a non-ionic emulsifier and anionic emulsifier.
    Type: Grant
    Filed: August 7, 1989
    Date of Patent: November 6, 1990
    Assignee: Rohm GmbH
    Inventors: Ernst Pfleiderer, Tilman Taeger, Gertrud Wick
  • Acrylate tanning agent
    Patent number: 4961750
    Abstract: Tanning agents containing a complex formed between chromium ions and an acrylate or methacrylate polymer and further including an organically bound thio group present in said polymer or in a mercapto compound added to the tanning agents, and methods for pickling, tanning, and retanning skins and hides with such tanning agents.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: October 9, 1990
    Assignee: Rohm GmbH
    Inventors: Juergen Christner, Ernst Pfleiderer, Tilman Taeger, Gertrud Wick
  • Enzymatic unhairing method
    Patent number: 4636222
    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.
    Type: Grant
    Filed: July 30, 1985
    Date of Patent: January 13, 1987
    Assignee: Rohm GmbH
    Inventors: Ernst Pfleiderer, Tilman Taeger, Gertrud Wick