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US1651688A
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Process of reclaiming waste lubricating mineral oil containing soaps
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US1282799A
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Method of and apparatus for conveying and absorbing gases.
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US1318657A
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Method of and apparatus for distillation.
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US1212620A
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Method of and apparatus for distilling hydrocarbons.
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US1135785A
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Process and apparatus for producing hydroxids of metals by means of ammonia.
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US903697A
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Filter.
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US791090A
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Process of extracting nickel from nickel-bearing substances.
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US773636A
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Process of recovering nickel oxid and ammonia.
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US763053A
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Method of recovering nickel hydroxid.
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US717184A
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Process of making starch.
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US697465A
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Process of making caustic alkali.
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US688463A
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Method of making caustic alkali.
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US689391A
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Process of producing nickel salts.
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US717183A
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Cobalt-ammonium salt and process of making same.
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US697831A
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Method of recovering metals by electrolysis.
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US669899A
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Nickel salt and process of making same.
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US720235A
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Process of recovering and separating metals from their ores.
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CA70471A
|
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Method of recovering metals by electrolysis
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US669442A
|
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Process of recovering and separating metals by electrolysis.
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US669441A
|
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Method of producing alkali by electrolysis.
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