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Class Information
Number: 8/94.15
Name: Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers > Treatment of hides, skins, feathers and animal tissues > Treatment of untanned skins or hides
Description: Processes directed to the treatment of untanned skins or hides.

Sub-classes under this class:

Class Number Class Name Patents
8/94.17 Alkaline material removal 23
8/94.18 With organic material 113

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8481169 Leather Jul. 9, 2013
8334021 Aldehyde reduction in aqueous coating and leather finishing compositions Dec. 18, 2012
8308821 Process for treating animal skins Nov. 13, 2012
8206461 Process and device for treating leather Jun. 26, 2012
8002846 Method for manufacturing protein filling agent for leather utilizing animal hairs Aug. 23, 2011
7984568 Condensation type laundry dryer Jul. 26, 2011
7754258 Porcine collagen film Jul. 13, 2010
7753964 Method for producing a leather semi-finished product Jul. 13, 2010
7749409 Fatliquoring agents for the flame-retardant treatment of leather Jul. 6, 2010
7728072 Epichlorohydrin amine polymers used for treating the surface of leather Jun. 1, 2010
7527652 Dithiol compositions and methods of treating animal hides using the same May. 5, 2009
7404826 Method for removing horn substance from skins, pelts or furs Jul. 29, 2008
7270985 Process for the preparation of aldehyde from a proteinous source for industrial applications Sep. 18, 2007
7252687 Process for making wet-pink leather Aug. 7, 2007
7250062 Method for removing horn substances from animal skin Jul. 31, 2007
7118603 Process for the preparation of a formaldehyde-free synthetic tanning agent Oct. 10, 2006
7115387 Process for the preparation of aldehyde from a proteinous source for industrial applications Oct. 3, 2006
7001435 Leather treatment Feb. 21, 2006
6964745 Use of superabsorbent polymers for treating raw skins, corresponding compositions and methods and resulting treated skins Nov. 15, 2005
6942961 Method for dehydrating biological tissue for producing preserved transplants Sep. 13, 2005
6855171 Process for waterproofing leather and leather obtained by means of said process Feb. 15, 2005
6849095 Agent and method for enzymatically tanning skins Feb. 1, 2005
6811572 Plush leather-like sheet product and method for production thereof Nov. 2, 2004
6689172 Auxiliary for liming and loosening hairs of animal skins Feb. 10, 2004
6663676 Preparation of an aqueous composition for treating leather Dec. 16, 2003
6589293 Depilatory paint thickener comprising an anylopectin starch Jul. 8, 2003
6540790 Tanning leather Apr. 1, 2003
6482240 Method of making a collagen membrane from porcine skin Nov. 19, 2002
6451062 Hide-curing additive Sep. 17, 2002
6395040 Process for producing leather May. 28, 2002
6387135 Treatment of hides May. 14, 2002
6322717 Method of processing leather material, leather material thus processed and leather product using leather material thus process Nov. 27, 2001
6251414 Aqueous formulation for pretanning raw hides Jun. 26, 2001
5985167 Wet treatment of leather hides Nov. 16, 1999
5931970 Process for treating leathers with surfactants to improve water repellency Aug. 3, 1999
5900027 Process for preparing animal hides or pelts May. 4, 1999
5868798 Treatment of hides Feb. 9, 1999
5733340 Aqueous composition for the pretanning of hide pelts or retanning of leather Mar. 31, 1998
5728313 Leather oiling compositions and their use Mar. 17, 1998
5720778 Method of producing high-molecular products from collagen-containing materials, and product produced by the same Feb. 24, 1998
5710040 Stable enzymatic aqueous liquid composition for the production of leather Jan. 20, 1998
5683611 Preparations for the oiling of leather Nov. 4, 1997
5567205 Wet treatment of leather hides Oct. 22, 1996
5512058 Process for the treatment of skins, hides or shett materials containing collagen by a dense, pressurized fluid Apr. 30, 1996
5501709 Economy and plumping chrome tanning Mar. 26, 1996
5480456 Silica sols for obtaining a hide which is called a stabilized pickled or white or stabilized white Jan. 2, 1996
5435808 Hide raceway treatment and improved method of curing hides Jul. 25, 1995
5427594 Process for pickling raw hides Jun. 27, 1995
5425783 Technique of tanning snake skins, and a material for painting and calligraphy produced by the technique Jun. 20, 1995
5376142 Method to treat animal skins prior to tanning Dec. 27, 1994

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