U.S. federal trademark · Serial No. 78068743 · Reg. No. 2612856
Drilling fluid additives, for use in water, oil based or synthetic mud, composed of bridging and sealing agents, utilized to plug highly permeable underground zones, including highly permeable sands and shales against loss of drilling fluid into said zones
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.