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US2215055A
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Method for preparing hides using mold tryptases, and a neutral to weakly acid reaction
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US2179899A
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Process for preparing hides
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US2115880A
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Tanning process
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Method for producing hides with the aid of mold tryptases
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Method for producing dehaired hides with the aid of mold tryptases in alkaline solution
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Sole leather and process of preparing the same
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Method for producing unhaired hides with the aid of mold tryptases
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Method for producing stable alkali polysulphides
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GB445478A
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Improvements in or relating to a method of carrying out reactions for the conversion of liquid materials into solid or semi-solid products
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US1977973A
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Treatment of skins and hides
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Egg yolk substitute for tanning
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US1751217A
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Emulsion
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US1735977A
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Treatment of hides
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US1569578A
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Manufacture of tanning substances
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US1383264A
|
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Solid non-hygroscopic iron salt and the preparation thereof
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US1397387A
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Process for the manufacture of iron-leather
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Process for making glue and the like from glue material
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US1364316A
|
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Process for making leather with the assistance of iron salts
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US1364317A
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Process for producing leather with the assistance of iron salts
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