| Patents for C14C 1 - Treating skins or hides with chemicals, enzymes or micro-organisms prior to tanning (1,091) |
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| 03/28/1993 | WO1993006249A2 Use of phosphonium compounds in the production of leather |
| 03/28/1993 | CA2096844A1 Use of phosphonium compounds in the production of leather |
| 03/24/1993 | EP0533011A1 Process for producing chrome-tanned leather |
| 03/20/1993 | CA2078411A1 Process for producing chrome leather |
| 12/24/1992 | DE4119889A1 Enzymatic prodn. of hide and skin - using lipase with no surfactant in soaking stage and little or no surfactant in washing, hair removal and alkaline treatment stages |
| 12/23/1992 | EP0519399A2 Process for the depilation of animal skins |
| 10/15/1992 | WO1992017613A1 Hide liming and drenching process using enzymes |
| 09/30/1992 | EP0505920A1 Enzymatically assisted liming process |
| 09/22/1992 | US5149295 Method for de-hairing animals |
| 09/15/1992 | US5147693 Biologically stable, untanned wet animal hides |
| 08/05/1992 | CN1063312A Process of treatment pelts or leather, tanning agents and process of production |
| 07/29/1992 | EP0495873A1 A method of treating hides. |
| 07/15/1992 | CN1062766A Fur leather producing method and use |
| 07/09/1992 | WO1992011391A1 Method for processing hides or leather, tanning agents and method for manufacturing same |
| 06/10/1992 | CN1061801A Production process for chrome tanning of cattle hide and its products |
| 05/14/1992 | WO1992007963A1 Method for de-hairing animals |
| 05/05/1992 | CA1299822C Biologically stabilized untanned skins and process for their preparation |
| 04/14/1992 | US5103521 Leather treatment agent and its use |
| 04/07/1992 | US5102422 Methods for leather processing including liquid enzyme formulation |
| 03/25/1992 | EP0264398A4 Process for the treatment of wool skins |
| 03/24/1992 | US5098446 Surfactants for treatment of leather, hydration, pickling, degreasing and tanning |
| 03/17/1992 | US5096553 Treatment of raw animal hides and skins |
| 03/11/1992 | CN1059367A Manufacturing method of protective cover leather for automobile steering wheel |
| 03/04/1992 | CN1059169A Processing method for tanning down fur |
| 02/22/1992 | CA2047774A1 Process for skin fleshing |
| 02/18/1992 | US5089414 Defatting in alkaline solution containing lipase, protease, surfactant |
| 01/08/1992 | EP0464531A2 Enzymatic bating preparations |
| 12/11/1991 | CN1056898A Technique of making fur coat with goose down |
| 11/20/1991 | CN1014801B Process for preparing goose down skin |
| 11/20/1991 | CN1014800B Widely suitable fur wetting agent |
| 10/23/1991 | CN1014430B Prepn. of composite fatting agent for leather composing of sodium aliphatic amido-carboxylate |
| 10/02/1991 | EP0448948A1 Process for the treatment of leather and hides |
| 10/02/1991 | CN1055011A Depilation process by liming and enzyme method featuring complete solution of sulfur pollution |
| 07/31/1991 | EP0439108A1 Process for deliming hides in the tanning industry and apparatus for carrying out said process |
| 07/31/1991 | CN1053413A Process and apparatus for treadment of brines and contaminated mineral salts or mixtures thereof |
| 07/24/1991 | EP0437997A1 Process for a facilitated splitting of hides in the state of intestine |
| 07/10/1991 | CN1052898A Productive technology of soft ass leather |
| 07/02/1991 | CA1285351C Leather treatment agent and its use |
| 04/17/1991 | EP0422954A1 Use of fluorochemicals in leather manufacture |
| 04/14/1991 | WO1991005877A1 A method of treating hides |
| 04/14/1991 | CA2065862A1 Method of treating hides |
| 04/14/1991 | CA2025027A1 Use of fluorochemicals in leather manufacture |
| 04/03/1991 | CN1050408A Productive technique for degreasing and tanning goose down hide |
| 03/27/1991 | CN1012179B Processing method of eider-down and goose down furskins |
| 03/12/1991 | US4999024 Making a water washable product, sealing oils and greases in the pores |
| 02/28/1991 | DE3928128A1 Cleaning and washing agent which is kind to skin - contg. long chain sulphonium salt of glycol semi-ester of sulphuric acid |
| 02/27/1991 | CN1049527A Method of treatment and articles of leather |
| 02/27/1991 | CN1049525A Non-tanning and biostabilizing wet hide |
| 02/06/1991 | EP0411986A1 Untanned hides biologically stable in wet form |
| 01/30/1991 | EP0410862A1 Method of treating hides and hides thus treated |
| 01/29/1991 | CA2022134A1 Process for the treatment of skins and skins obtained therefrom |
| 01/29/1991 | CA2022044A1 Untanned, biologically stable skins, in humid form |
| 01/15/1991 | US4985039 Shock freezing with carbon dioxide, storage |
| 12/18/1990 | US4978361 Economy chrome tanning |
| 11/21/1990 | CN1010484B Tanning method for fowls'down (s) |
| 11/06/1990 | US4968621 Proteolytic enzyme in presence of nonionic and anionic emulsifiers |
| 10/18/1990 | WO1990012118A1 Enzymatic method for unhairing of hides or skins |
| 10/02/1990 | US4960428 Method for liming skins and hides |
| 07/24/1990 | US4943530 Liquid enzyme preparations |
| 06/19/1990 | US4935031 With an alkali metal chlorite solution containing a phenyl sulfonate |
| 06/13/1990 | CN1042941A Process of tanning of fowl goose down leather |
| 06/12/1990 | CA1270224A1 Treatment of raw hides and skins |
| 04/24/1990 | US4919680 High-extraction chrome tanning process |
| 03/14/1990 | EP0357682A1 Process for the treatment of hides |
| 02/14/1990 | EP0354337A2 Animal skin preservation |
| 01/31/1990 | CN1039263A Method and apparatus for preparing goose down skin |
| 01/10/1990 | CN1038670A Processing method of eider-down and goose down furskins |
| 12/26/1989 | US4889811 Methods for making leather |
| 12/13/1989 | CN1037928A Depilation technology using triisopropanolamine |
| 11/02/1989 | EP0339437A1 Tanning process saving chromium |
| 08/02/1989 | EP0326059A2 Liming process for obtaining hair |
| 07/26/1989 | CN1034224A Tanning method for fowls' down(s) |
| 07/25/1989 | CA1257755A1 Deliming of hides and use of cyclic esters of sulfurous acid as deliming agents |
| 06/27/1989 | US4842610 Depilatory compositions and methods |
| 05/17/1989 | CN1032957A Method of tanning horse hide |
| 05/16/1989 | US4830633 Coating with aqueous solution or emulsion of film forming polymer and depilatory, drying, peeling |
| 05/03/1989 | CN1004078B Process for preparation of fish skin |
| 03/15/1989 | CN1031718A Prepn. of composite fatting agent for leather composing of sodium aliphatic amido-carboxlate |
| 03/09/1989 | WO1989001980A1 Process for reliming smoothed skins and splits |
| 03/08/1989 | EP0306474A1 Method of post-liming skins and slit hides |
| 03/01/1989 | EP0304677A1 Tanning method with high chrome exhaustion |
| 02/08/1989 | EP0209780B1 Leather-treating agent and its use |
| 12/29/1988 | WO1988010317A1 Process for the treatment of hides |
| 12/07/1988 | EP0293705A2 Method for the limited preservation of hides and skins |
| 11/23/1988 | CN87102642A Application of sulfhydryl sodium in lime soakage of pig leather |
| 09/13/1988 | US4770010 Procedure for removing the layer of hairy elements from a complete animal skin |
| 09/07/1988 | EP0281486A1 Biologically stabilised and untanned hides and method for their preparation |
| 08/25/1988 | WO1988006183A1 Liquid composition of enzymes |
| 08/10/1988 | CN85100819B New pollution-free tanning technology |
| 08/09/1988 | US4762522 Agent for treatment of hides and pelts |
| 06/15/1988 | EP0270767A1 Tanning process saving chrome |
| 04/27/1988 | EP0264398A1 Process for the treatment of wool skins. |
| 04/20/1988 | CN86107040A Widely suitable fur wetting agent |
| 03/08/1988 | US4729768 Deliming of hides and use of cyclic esters of sulfurous acid as deliming agents |
| 12/29/1987 | US4715861 Economy chrome tanning process with aldehyde-acids and keto-acids |
| 12/15/1987 | US4713078 Treatment with aqueous cyanamide solution |
| 11/26/1987 | DE3617448A1 Continuous unhairing of animal hides |
| 11/05/1987 | WO1987006622A1 Process for the treatment of wool skins |
| 09/09/1987 | EP0235832A1 Process and installation for degreasing raw hides, and raw hides degreased by this process |
| 07/29/1987 | CN86107461A Process for preparation of fish skin |