Resource Type

Automatic Separator and Evaporator. (open access)

Automatic Separator and Evaporator.

Patent for an improved automatic separator and evaporator which controls the intake with an included air-lift or jet-ejector, including illustrations.
Date: April 5, 1921
Creator: Allen, Charles
System: The Portal to Texas History
Filtering Material. (open access)

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
Feed Spout Barrier (open access)

Feed Spout Barrier

Patent for "a feel spout barrier for slime thickeners, settling tanks, separating tanks and the like" (lines 8-10) with instructions and illustrations.
Date: April 12, 1921
Creator: Allen, Charles
System: The Portal to Texas History
Treatment of Ores. (open access)

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