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Improvement in Mixing Mineral and Fossil Substances with Bituminized Clay to Form a Plastic Material.
Reissued patent for a chemical process to create a plastic material made of bitumen, clay, and mineral and/or fossil substances.
Date:
September 26, 1876
Creator:
Lea, Pryor
System:
The Portal to Texas History
Improvement in Combining Bitumen and Clay.
Patent for a method of combining bitumen, water, and clay for such purposes as plastering.
Date:
September 24, 1872
Creator:
Lea, Pryor
System:
The Portal to Texas History