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| Number | Title | Issue Date |
| 7250062 | Method for removing horn substances from animal skin The invention relates to a method for removing horn substances from animal skin. The method is characterized in that animal skins are treated in an aqueous bath containing between 0.05 and 5 wt. %, in relation to the weight of the salt, of at least one compound of g... | 07/31/2007 |
| 7198647 | Process for lime and sulfide free unhairing of skins or hides using animal and/or plant enzymes The present invention relates to a process for lime- and sulfide-free unhairing of skins/hides using animal and/or herbal (plant) enzymes. The process comprises presoaking the skins or hides in water for 2–6 hours, pasting an enzyme solution of animal or plant ori... | 04/03/2007 |
| 7186546 | Process for the preparation of alkaline protease The present invention relates to a process for the preparation of alkaline protease using a fungal culture of the order entomophthorales and to the use of the said protease in the pretanning processes of leather manufacture. ... | 03/06/2007 |
| 7065152 | Controller area network using transformers A controller area network (CAN) data link is provided including a first node, a second node, and a transformer circuit connected between the first and second nodes to provide electrical isolation. The transformer circuit provides the requisite electrical isolation a... | 06/20/2006 |
| 7013838 | Bleached expanded pigskin and products Pigskin is processed to provide a bleached, expanded skin used in dog treat or chew products. The raw pigskin is dehaired and then daubed with an alkali mixture of an alkali liquid, alkali enzymes and lime, the mixture having a pH of greater than or equal to 12. The... | 03/21/2006 |
| 6957554 | Dehairing and fiber opening process for complete elimination of lime and sodium sulfide The use of lime and sodium sulfide in leather making creates a lot of environmental concern. However, there is no commercial beam house process that could totally eliminate the use of lime and sodium sulfide. In this invention, a novel bio-chemical process has been ... | 10/25/2005 |
| 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 |
| 6482240 | Method of making a collagen membrane from porcine skin Collagen membranes are formed from porcine rinds (i.e., pig skins) for us in a variety of applications and, most preferably, for wrapping food products, such as hams and the like. First, after removing skins from the porcine, the skins are promptly frozen... | 11/19/2002 |
| 5868798 | Treatment 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 |
| 5427594 | Process for pickling raw hides A process for pickling raw hides, which comprises treating a delimed raw hide with an aqueous liquor that comprises a reaction product of phenol and a sulfonating agent, the molar ratio of (phenol):(SO3) being (1):(1.1-2.2), and which is free f... | 06/27/1995 |
| 5328677 | Recovery of sulfides from tannery waste liquor An apparatus and process for the removal and recovery of sulfides from tannery waste water or liquor. The apparatus comprises a closed vessel, the sulfide-bearing liquor is introduced into a first or acidulation zone of the vessel and mixed with acid to d... | 07/12/1994 |
| 5028695 | Process for the manufacture of collagen membranes used for hemostasis, the dressing of wounds and for implants The invention concerns a process for the manufacture of collagen membranes for medical applications, in which process the collagen raw materials obtained from cattle or pig collagen are mechanically freed of fatty residues and treated with diluted alkali ... | 07/02/1991 |
| 4960428 | Method for liming skins and hides A process for liming skins and hides with preservation and separation of the hair, including the following successive steps: (A) a soaking step in a aqueous liquor containing a surfactant; (B) an incubation step in an aqueous liquor free of inorganic sulfur but ... | 10/02/1990 |
| 4801299 | Body implants of extracellular matrix and means and methods of making and using such implants A sterile body implant is derived from a body structure having as its major protein component collagens in the form of extracellular matrix. The body structure is treated to remove cellular membranes, nucleic acids, lipids and cytoplasmic components. Such... | 01/31/1989 |
| 4614520 | Leather processing A process is disclosed for preparing a suede leather product from animal hides. The hide is scalded before tanning and the finished product can be washed and ironed in a manner similar to a woolen garment. The hide is pretanned in formaldehyde, neutralize... | 09/30/1986 |
| 4484924 | Process for producing unhaired, storable hides and skins What is disclosed is a process for the unhairing and subsequent curing of hides and skins, which comprises washing flayed skins and hides to remove adhering dirt, then soaking said skins and hides and freeing them of hair and scud with a short term unhair... | 11/27/1984 |
| 4457759 | Environment-protecting method for the liming of raw hides The invention relates to an environment-protecting method for the liming of raw hides, wherein, after an optional mechanical degreasing step, the hides are subjected to presoaking, chemical degreasing, washing, alkaline swelling and collapsing, enzymatic ... | 07/03/1984 |
| 4443221 | Tanning method What are disclosed are improved methods for the preparation of leather wherein, in one or more steps for preparing leather from limed animal skins or hides, including beamhouse operations such as deliming, bating, pickling, and degreasing to prepare unhai... | 04/17/1984 |
| 4398911 | Tanning method What is disclosed are improved methods for the preparation of leather wherein, in one or more steps for preparing leather from animal skins or hides, including beamhouse operations such as soaking, dehairing, opening of the hide structure, deliming, batin... | 08/16/1983 |
| 4391601 | Writing parchment and methods for the production thereof The invention provides fine writing parchment made from the skins of turkeys. The invention also provides a process for preparing fine writing parchment from the skins of turkeys comprising liming, defatting, washing and stretching the skins.... | 07/05/1983 |
| 4377387 | Deliming hides Conventionally limed hides are delimed for from one to six hours under conventional deliming conditions in respect of liquor length, temperature and pH of the liquor, by a process in which a cyclic carbonate of a polyhydric aliphatic alcohol of 2 to 6 car... | 03/22/1983 |
| 4333731 | Method and apparatus for the manufacture of tanned hides and skins A method for the wet processes in tanneries, e.g. soaking, liming, deliming, bating, pickling and tanning, wherein the liquids or solutions necessary for these processes are injected by high pressure into the hide or skin, and an apparatus for the realiza... | 06/08/1982 |
| 4229175 | Lime-free and sulfide-free liming process A continuous liming process using sodium hydroxide solution and sodium sulfate and/or sodium salts of dicarboxylic acids, instead of conventional liming components.... | 10/21/1980 |
| 4221564 | Water-insoluble alkali metal aluminosilicates and polycarboxylic acids in the tanning process for the production of leather In the process of tanning for the production of leather comprising subjecting uncured hides to the action of an aqueous liquor containing (1) chemical tanning agents, and (2) auxiliary chemicals to tanning and recovering leather, the improvement consistin... | 09/09/1980 |
| 4213760 | Deliming of hides A process for deliming hides, in which, instead of using conventional acids or acid salts, esters which hydrolyze under the conventional deliming conditions are employed. This avoids the disadvantages associated with an overdose of conventional deliming a... | 07/22/1980 |
| 4105402 | Treatment of sulfide-limed pelts in acid baths A method of treating sulfide-limed pelts in improved acid treating baths for purposes of de-liming, bating, pickling, or pre-tanning is disclosed. The improved baths contain water-soluble salts of manganese, cobalt, nickel, titanium, or zirconium, which s... | 08/08/1978 |
| 3997290 | Process to separate and recover the solid and liquid phases from treatment baths of hides and skins The present invention provides a process to separate and recover the solid and liquid phases from treatment baths of hides and skins. The solid phase contains valuable components used in a variety of industries providing a wide field of industrial applica... | 12/14/1976 |
