U.S. federal trademark · Serial No. 85791381 · Reg. No. 4573125
Purge plug system comprised primarily of inflatable fire-resistant fabric bags in the nature of sealing plugs, a pressure relief valve, and a stainless steel spinal hose to control the supply of inert gas that flows inside a pipe that is being purge welded
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.