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Class 8/94.2 - With subsequent treatment


Subclass of Class 8 - Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
Definition: Processes including a significant treatment of the tanned
No. of patents: 46
Last issue date: 09/09/2008


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NumberTitleIssue Date
7422607Anti-calcification treatments for heart valves and vascular grafts
The present invention provides processes for fixation of biological tissue and/or post-fixation treatment of such tissue that result in modified tissues with reduced susceptibility to in vitro calcification when used in prosthetic devices. The invention also relates...
09/09/2008
7208016Chromium-free, waterproof leather
Chromium-free leather having a waterproofness, measured as penetration time according to DIN 53338 , of at least 30 min. ...
04/24/2007
7157017Fungicidal compositions and methods using cyanodithiocarbimates
The invention relates to control fungal growth on tanned hides, using cyanodithiocarbimates of formula (I): X is a halogen; R is a substituted or unsubstituted C1–...
01/02/2007
7060363Chromium-free, waterproof leather
Chromium-free leather having a waterproofness, measured as penetration time according to DIN 53338, of at least 30 min. ...
06/13/2006
7033402Transposed process for making leather
The present invention relates to a novel leather making process whereby the post-tanning wet operations are done prior to tanning stage itself to make leather in eco-friendly manner in substantially shorter duration. The present process reduces the number of require...
04/25/2006
6827745Mixture of THP and a moderator to tan leather
A mixture of THP and a moderator is used to tan leather. The moderator is selected from metaphosphates and polyhydroxy or polypyrolidyl compounds such as glycerol, carboxydrates PVA or PVP. ...
12/07/2004
6685746Impregnation of leather with micro-encapsulated material
A material is impregnated into leather by incorporating the material into micro-capsules and then applying said micro-capsules to said leather material by means of a suitable process. A roller coating process is described in which the material is applied ...
02/03/2004
6033590Compositions for the preparation of leather
Compositions for the simultaneous retanning and fatliquoring of leather are described which may include further leather treatment agents as well....
03/07/2000
6022383Processes for coloring leather by an ink-jet printing method using anionic coloring agents and cationic agents, and leather products obtained therewith
A leather coloring process for carrying out coloring on a natural leather, or a natural leather which has been subjected to degreasing. The coloring process is accomplished by ink-jet coloring on at least a partial area of the natural leather....
02/08/2000
5980578Process for waterproofing leather at low pH-values and leathers manufactured thereby
The present invention relates to a process for waterproofing leathers, furs and other fibrous materials wherein waterproofing is carried out with conventional water repellents in the presence of dispersing or stabilizing auxiliary agents at pH-values of 3...
11/09/1999
5972037Leather tanning processes and the products thereof
The production of household-machine washable and dryable, waterproof, nonflammable, and extremely colorfast leathers from wet blue hides by a process which has the advantage that significantly reduced volumes of toxic wastes are generated. The wet blue hi...
10/26/1999
5931970Process for treating leathers with surfactants to improve water repellency
The present invention relates to a process for improving the waterproofing of hides, skins, leathers, and furs, as well as other fibrous materials, by treatment with special surfactants in the beamhouse and/or in the treatment of the wet blues, prior to w...
08/03/1999
5900027Process for preparing animal hides or pelts
In order to make processes for finishing animal hides or pelts less labor-intensive and more environmentally compatible, a process is proposed in which, following a conventionally conducted soak, the animal hides or pelts are treated with a conventional t...
05/04/1999
5868798Treatment of hides
A process and apparatus for treating animal skins or hides (10) comprises stretching the hide to extend it and to open the structures and mounting the hide in a frame (15) by ties (12) extending between the hide edge attachments (11) and the frame. The hi...
02/09/1999
5830238Process for improving the surface yield in the fabrication of tanned hides
Procedure to improve the area yield in the manufacture of leather consisting of a thermal treatment applied to the extended or stretched leather, before the operation of drying. During this treatment there should be no loss in the water content of the lea...
11/03/1998
5820633Method of treating leather with improved retaining agents
The present invention is directed to a method of treating tanned leather to improve its dyeing characteristics while still retaining desired grain break and grain strength. The tanned leather is contacted, preferably by immersion, in a float containing a ...
10/13/1998
5759706Graphite lubricated leather for use in garments footwear and other leather products; a method for lubricating leather with graphite and a graphite impregnated leather product
A graphite lubricated leather and a method for producing a graphite lubricated leather is provided. A chrome tanned leather having internal fiber matrix is lubricated by application of a graphite powder suspended in a gluteraldehyde solution which has the...
06/02/1998
5733340Aqueous composition for the pretanning of hide pelts or retanning of leather
An aqueous composition for the pretanning of hide pelts or for the retanning of leather comprises (A) an aliphatic dialdehyde containing 2 to 8 carbon atoms, (B) an anionic aromatic tanning agent, (C) water and, if desired, (D) an acid. The leather tanned...
03/31/1998
5720778Method of producing high-molecular products from collagen-containing materials, and product produced by the same
A method of producing a collagen-containing material has the steps of comminuting untanned collagen-containing raw material, preparing from the raw material a collagen solution, preparing a leather paste from tanned collagen-containing waste, mixing the c...
02/24/1998
5686011Process for waterproofing materials having a fibrous structure and agents used to carry out this process
A process is disclosed for waterproofing materials having a fibrous structure, such as leather, persian leather or leather replacement materials, by using waterproofing agents containing sulfosuccinic acid esters. Also disclosed are waterproofing agents u...
11/11/1997
5571443Synergistic combination of 2-(thiocyanomethylthio)benzothiazole and thiophanate compounds useful as fungicides
A method for preventing the deterioration of leather by controlling the growth of fungus, wherein the leather is contacted with TCMTB and a thiophanate compound present in a combined amount synergistically effective to control the growth of at least one f...
11/05/1996
5512058Process for the treatment of skins, hides or shett materials containing collagen by a dense, pressurized fluid
A process for the treatment of products constituted by hides and skins with a view towards their transformation into leather, and for the treatment of leather which involves contacting the product with a dense, pressurized fluid, such as CO2, i...
04/30/1996
5503754Wet treatment of leather hides
Wet leather treating compositions and methods of wet treating leather hides employing alkylpolyglycosides for enhancing the penetration and absorption of the leather treatment formulations in an environmentally safe manner. The compositions are substantia...
04/02/1996
5500020Process for titanium-based mixed tannings
The tanning of skins is carried out using a titanium-based compound in a percentage of 5% to 10% and especially of 6% with respect to the pelt weight of the skins; a washing treatment is carried out between a basification phase and a further tanning phase...
03/19/1996
5368609Softening filler for leather
The invention is an aqueous softening filler for leather and a process for softening leather which utilizes the softening filler. The softening filler comprises thermoexpansible microcapsules. The thermoexpansible microcapsules are impregnated into the le...
11/29/1994
5350422Process for improving the fixation of dyes on materials containing amide groups
A process which comprises submitting a polyamide textile material, which has been dyed with an acid dye and subsequently treated with an acidic syntan, to treatment with a cationic agent having a plurality of cationic centers....
09/27/1994
5269814Method of producing a split leather, especially for automotive applications subject to temperature and humidity fluctuations
Between a chrome tanning step and a fat liquor treatment step, a flesh side split leather is subjected to shaving on both its split and flesh sides to a thickness of 1.1 to 2.5 mm, preferably 1.2 to 1.5 mm and is then aftertanned. After a split side dress...
12/14/1993
5256318Leather treatment and process for treating leather
A tanned leather treated with a fatliquoring agent in combination with a fluorine-containing oil, which has good touch, water resistance, water- and oil-repellency, washing resistance, and which is not discolored or faded by dry cleaning....
10/26/1993
5224963Quaternized condensation products for aftertreating dyed leather
Dyed leather is aftertreated with quaternized condensation products of A) a precondensate of one or more trialkanolamines of the Formula I ##STR1## B) a) a carboxylic acid derivative thereof IIa ##STR2## b) a carboxamide IIb ##STR3## c) an ...
07/06/1993
5098446Use of fluorochemicals in leather manufacture
Leather manufacturing processes are described in which fluorochemicals are included in the various processing baths to improve efficiency, reduce processing time, and increase the quality of the finished leather product. Various types of fluorochemicals a...
03/24/1992
4976733Prevention of prosthesis calcification
A method for retarding or preventing the calcification of a prosthesis implanted in a mammal by covalently coupling to the prosthesis before implantation an effective amount of an anticalcification agent in the form of an aliphatic carboxylic acid, or a d...
12/11/1990
4889811Methods for making leather
Methods for making leather from animal hides and skins in the presence of surface active agents wherein certain phosphonic acid compounds are used in place of, or in combination with, known surface active agents....
12/26/1989
4810251Fatliquoring solution dispersion or emulsion and a process for treating leather therewith
Aqueous fatliquoring solutions, dispersions or emulsions are made with (a) polyethers having at least two hydroxyl groups and a molecular weight of from 200 to 20,000 and/or (b) polyester containing at least two hydroxyl groups and a molecular weight of f...
03/07/1989
4786287Process for decreasing residual aldehyde levels in implantable bioprosthetic tissue
Residual aldehyde levels in bioprosthetic tissue are reduced by contacting the tissue with a rinsing solution such that aldehyde which has diffused out of the tissue into the rinsing solution comes into contact with, and reacts with, an amine, thus causin...
11/22/1988
4772289Primer for leather finishes
A process for improving the adhesion of finishes to oiled and/or hydrophobicized leathers wherein oiled and/or hydrophobicized leathers are treated before prefinishing and/or in the prefinish with aqueous dispersions containing (A) short-chain and/or medi...
09/20/1988
4705586Method of working leather for the uppers of leather footwear
A method of working leather, in which a deposit of material adhering to the leather is made on the surface of the leather to enable a leather footwear upper treated in this way to adhere to a sole without being carded or sanded, either by direct injection...
11/10/1987
4631063Process for finish dressing minerally dressed leathers or those dressed by a combined method, using polymer dressings
A process for the finish dressing of leathers dressed by a mineral or a combined method, by treatment with an aqueous solution of water soluble polymer dressing substances that are polymers of unsaturated monomers that contain sulfonic groups. These polym...
12/23/1986
4596581Carboxyl- and amino-containing copolymer for after-tanning mineral tanned leather
An amino-containing and carboxyl-containing polymer tanning agent containing more carboxyl groups than amino groups, when used for retanning mineral-tanned leather, gives, alone or in combination with conventional anionic retanning agents, leather which i...
06/24/1986
4533358Process for producing a shaped product of collagen by syneresis
A process for producing a shaped product of collagen by a wet or electrochemical method from a pasty composition comprising a collagenous substance or a mixture thereof with another high molecular substance. The composition or a product shaped therefrom i...
08/06/1985
4484925Tanning method designed to make leathers mycostatic, antimycotic, and antifungal, and the resulting products
The invention relates to the tanning of leather. The tanning method according to the invention, which is designed to confer on the leathers and hides biostatic properties without migration of the active agent, involves tanning the leathers and hides with non-s...
11/27/1984
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