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Purifying Oils

Description: Patent that converts low grade petroleum into higher grade petroleum. The process warms aluminum chlorid with petroleum material in a nonviolent way to make a purifying oil.
Date: August 27, 1918
Creator: McAfee, Almer M.
Partner: UNT Libraries Government Documents Department

Rail Joint

Description: Patent for improved rail joints to lock rail sections together against accidental displacement with illustrations.
Date: August 15, 1918
Creator: Stewart, Amon Leslie
Partner: UNT Libraries Government Documents Department

Process of Purifying Paraffin.

Description: Patent for improvements in the process of purifying paraffin wax.
Date: August 27, 1918
Creator: McAfee, Almer M.
Partner: UNT Libraries Government Documents Department
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