Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7651531 | Bio-tanning process for leather making Conventionally skins/hides are tanned with metal-ions and vegetable tannins. Environmental constraints on the discharge of toxic metal-ions and poor biodegradable vegetable tannins in the wastewater have become a serious issue. In this invention, the pelts are tanne... | 01/26/2010 |
| 7637961 | Composition and method for preparing leather An oligomeric composition containing oligomers and at least one stabilizing component is provided. An aqueous dispersion composition containing the oligomeric composition is useful for treating tanned leather to provide leather with increased softness or strength. A... | 12/29/2009 |
| 7410504 | Adducts based on cyclic compounds and the use thereof as tanning agents and curing agents Adducts are obtained by reacting carbonyl compounds of the formula I where R1 and R2 are as defined, with cyclic compounds of the formula II where X is selec... | 08/12/2008 |
| 7354457 | Tanning agent and curing agent based on dialdehydes Tanning agents can be prepared by reacting at least one aldehyde of formula I, with at least one further identical or different aldehyde of formula I, where Z is a single chemical bond, unsubstitute... | 04/08/2008 |
| 7282066 | Processes for preparing and using tanning agents and preservatives A process for the preparation of aqueous formulations, and aqueous formulations so prepared, the process comprising heating at least one cyclic compound of the formula I in the presence of water and of an acidic ... | 10/16/2007 |
| 7252687 | Process for making wet-pink leather A process of combination tannage is disclosed whereby Zirconium salt is complexed with THP salt to produce wet pink leather without using any conventional dye. The resulting leathers exhibit a shrinkage temperature of more than 100° C., and other properties compara... | 08/07/2007 |
| 7169191 | Process for preparing a synthetic aluminium tanning agent A novel synthetic aluminium tanning agent as an alternative for chromium based tanning salts without using formaldehyde was prepared by using aromatic polymeric matrix and aluminium (III) salts as raw materials with suitable masking agents. The preparation of the sy... | 01/30/2007 |
| 7160480 | Leather treated with fluorochemicals A method of treating leather for imparting soil resistance to the leather by contacting the leather with a fluorinated hydrophobic additive comprising at least one fluorinated urethane or a mixture of at least one fluorinated urethane with at least one fluorinated e... | 01/09/2007 |
| 7157017 | Fungicidal 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 |
| 7118603 | Process for the preparation of a formaldehyde-free synthetic tanning agent A process for the preparation of a synthetic tanning agent is disclosed whereby multi functional polymer is polymerized with sulfonated aromatic compound, pretreated with organic ligand to form an organo-polymeric matrix, which is essentially formaldehyde-free. The ... | 10/10/2006 |
| 7060363 | Chromium-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 |
| 7033402 | Transposed 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 |
| 6991659 | Production of tanned leather and products suitable therefore The invention provides a process for the production of tanned and optionally retanned leather by treatment of an optionally (pre)tanned animal hide or pelt with an aldehyde-based treatment agent (A), wherein the optionally (pre)tanned animal hide or pelt is treated ... | 01/31/2006 |
| 6953483 | Aloe vera processed leather and leather gloves, garments, shoes and sandals made from aloe vera processed leather and a process for making aloe vera processed leather An aloe vera re-tanned leather for use in a glove, garment, sandal or shoe. The leather includes tanned leather having an internal fiber matrix. An aloe vera powder of aloe vera particles in a gel carrier is in the tanned leather in a retanning process so that the a... | 10/11/2005 |
| 6953486 | Dyeing composition, method for obtaining the same and use for coloring the skin and/or keratinous fibres Colouring composition, method for obtaining and using same for colouring skin and/or keratin matters. The composition comprises, in a physiologically acceptable medium, an efficient amount of at least one colouring agent precursor selected among the compounds... | 10/11/2005 |
| 6685747 | Mixture of THP and chrome as tanning agents THP and chrome are synergistic tanning agents. The combination of THP with small amounts of chrome and optionally non-ionic and/or cationic surfactants gives increased area yield and shrink temperature compared with THP, and reduced environmental impact c... | 02/03/2004 |
| 6540790 | Tanning leather Leather is tanned by cross-linking collagen with tris(hydroxymethyl)phosphine or a condensate of a tetrakis(hydroxymethyl)phosphonium salt with an amide or amine in a main tannage or retannage.... | 04/01/2003 |
| 6478866 | Aqueous pigment preparations Aqueous pigment preparations containing a) at least one pigment, b) at least one condensation product based on A) suphonated aromatics, B) aldehydes and/or ketones and optionally C) one or several compounds selected from the group of non sulphonated aroma... | 11/12/2002 |
| 6336942 | Processes of treating leather and skins employing polymer compositions Aqueous solutions or aqueous emulsions of copolymers are obtainable by copolymerization of (a) from 20 to 95 mol % of at least one monoethylenically unsaturated C4 -C12 -dicarboxylic acid or the anhydride thereof with (b) from 5 to 80 mol... | 01/08/2002 |
| 6251414 | Aqueous formulation for pretanning raw hides There is disclosed an aqueous formulation for pretanning leather, which formulation comprises (a) a reductive saccharide having a dextrose equivalent of 10 to 100, and (b) an aliphatic dialdehyde containing 2 to 8 carbon atoms, and which is devoid of mineral s... | 06/26/2001 |
| 6200640 | Polymer composition and process for treating leather and fur skins Aqueous solutions or dispersions of copolymers obtainable by free-radical copolymerization of (a) from 20 to 90% by weight of at least one monoethylenically unsaturated C4-6 -dicarboxylic acid or the anhydride thereof, as component A, (b) from 5 to ... | 03/13/2001 |
| 6033442 | Use of aqueous solutions or dispersions of copolymers of carboxyl-group-containing monomers, ethylenically unsaturated acetals, ketals or orthocarboxylic acid esters and optionally other copolymerizable monomers as leather tanning agents The use of aqueous solutions or dispersions of copolymers composed of A) from 5 to 95 mol % of ethylenically unsaturated mono- or dicarboxylic acids having 3 to 10 carbons, their anhydrides, their alkali metal, alkaline earth metal or ammonium salts, or mixtur... | 03/07/2000 |
| 5985167 | Wet 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... | 11/16/1999 |
| 5980578 | Process 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 |
| 5972037 | Leather 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 |
| 5900027 | Process 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 |
| 5885302 | Leather tanning process The present invention refers to a new process meant for chrome and/or vegetable leather tanning. The process proposed by the invention comprises the steps of bating or purging, conditioning, and chrome and/or vegetable tannage. The conditioning step uses ... | 03/23/1999 |
| 5820634 | Process for tanning leather Bisulphite-blocked, polyether-modified polyisocyanates are outstandingly suitable, in combination with mineral tanning agents, for the tanning of leather.... | 10/13/1998 |
| 5820633 | Method 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 |
| 5733340 | Aqueous 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 |
| 5733339 | Process for fixation of calcification-resistant biological tissue A process is provided for non-glutaraldehyde fixation of an organ or prosthesis to be implanted in a mammal. The process produces stable fixation of the tissue by forming amide linkages within and between the molecules of the tissue and employs a coupling... | 03/31/1998 |
| 5725599 | Process for mineral tanning, re-tanning or leather after-treatment A process for the production of mineral tanned or/and re-tanned or/and after-treated leather or pelt, wherein before the mineral tanning, directly after the mineral tanning, directly before the mineral re-tanning, after the mineral re-tanning or/and with ... | 03/10/1998 |
| 5714560 | Water-soluble or water-dispersible graft polymers of proteins as leather tanning agents Water-soluble or water-dispersible graft polymers which are obtainable by free-radical-initiated polymerization of (A) a monomer or monomer mixture comprising (a) from 20 to 100% by weight of acrylic acid or methacrylic acid or a mixture thereof or alkali meta... | 02/03/1998 |
| 5709714 | Method of treating leather with amphoteric polymers The present invention is directed to a method of treating tanned leather stock to improve its color expression characteristics. The method provides for utilizing a two-stage amphoteric polymers, which improve the color expression characteristic of the tan... | 01/20/1998 |
| 5702490 | Water repellent treatment of leather and skins with polysiloxanes functionalized with carboxyl groups in a comb-like manner Leather and skins are water repellent in aqueous emulsion in the presence of emulsifiers with polysiloxanes which are functionalized with carboxyl groups in a comb-like manner and in which the carboxyl groups are bonded to the polymer main chain via space... | 12/30/1997 |
| 5686011 | Process 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 |
| 5618317 | Bisulfite-blocked polyisocyanates as tanning agents The present invention relates to tanning agents containing carbamoyl sulfonate groups that are prepared by the reaction of (A) organic polyisocyanates, (B) 0.01 to 0.4 equivalents, relative to the isocyanate groups of polyisocyanate (A), of polyether alcohols ... | 04/08/1997 |
| 5580355 | Leather tanning agent and standardizing agents for dyestuffs Polyaspartic acid and its salts and anhydrides are outstandingly suitable as tanning agents, as retanning agents and as standardizing agents for dyestuffs.... | 12/03/1996 |
| 5571443 | Synergistic 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 |
| 5567205 | Wet 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... | 10/22/1996 |
