UNT Libraries Government Documents Department - 2 Matching Results
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- Mold.
- Patent for a mold for viscous materials that are meant to be hardened in the mold or afterward. It is designed to be easily removed from the cast without damaging it.
- Process of Making Ammonium Ichthyol Sulfonate.
- Patent for "improvment in the process of making ichthyol sulfonate" (lines 10-13).