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Process of Refining Asphaltic Mineral Oils.

Description: Patent for process for refining asphaltic mineral oils such as might be found in wells in Texas and Louisiana. Designed to remove asphaltum.
Date: November 11, 1902
Creator: Mims, John Carwile
Partner: UNT Libraries Government Documents Department

Method of and Apparatus for Treating Mineral Pitch.

Description: Patent for an "improved method of and apparatus for treating mineral pitch and similar material to readily separate the asphalt and asphalt-oils from sand, bituminous rock, and other impurities contained in the mined material and removing the sand and impurities" (lines 12-17). The method circulates the material in hot water to separate the asphalt and asphalt-oils from the sand and impurities. The asphalt and oil rise to the top of the water and the impurities sink.
Date: November 5, 1895
Creator: Sellers, Harvey Lee; Conyngton, Hugh Ronald & Conyngton, Thomas
Partner: UNT Libraries Government Documents Department

Combined Pencil Holder and Sharpener.

Description: Patent for a combined pencil holder and sharpener, which uses the sharpener as a pencil cap.
Date: November 30, 1909
Creator: Haase, Conrad H.
Partner: UNT Libraries Government Documents Department
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