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Filtering Material.
Patent for "improved filtering stuff composition" (lines 8-9), containing vegetable ashes and an insoluble binding agent for the purpose of purifying liquids.
Date:
April 19, 1921
Creator:
Müller, Enrique
System:
The Portal to Texas History
Treatment of Ores.
Patent for the treatment of ores which has a improvised process of chloridizing ores, concentrates, and other metallurgical products.
Date:
April 19, 1921
Creator:
Hirt, Jules Hector
System:
The Portal to Texas History