U.S. federal trademark · Serial No. 77793399 · Reg. No. 3760877
ceramic pellets, shots, or spheres for use in oil well and gas well hydraulic fracturing operations and as a gravel pack material for sand control operations
proppants for use in oil well and gas well hydraulic fracturing operations; and ceramic particles used in the foundry industry to make castings and abrasive grains sold as an unfinished product for industrial use
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.