chemicals for use in industry; chemicals for use in refining petroleum and petroleum products; chemical additives for crude oil, oil, gas, and fuel; chemical additives for treatment of crude oil, oil, gas, and fuel; chemical products for improving the flow of crude oil, oil, gas, and fuel; chemical products for use in industry, namely, dissolving agents, for crude oil, oil, gas, and fuel; chemical products for use in industry, namely, inhibitors, for crude oil, oil, gas, and fuel; chemical pr...