(January 24, 2017, 2:13 PM EST) -- WASHINGTON, D.C. — A panel of the Federal Circuit U.S. Court of Appeals on Jan. 9 affirmed a ruling by a lower federal court and held that proppants, material added to hydraulic fracturing fluids imported from the People's Republic of China, are free from tariff based on their classification under the Harmonized Tariff Schedule of the United States (HTSUS) (Schlumberger Technology Corporation v. United States, No. 2015-2076, U.S. App., Fed. Cir.; 2017 U.S. App. LEXIS 322)....