U.S. federal trademark · Serial No. 75112296
non-metallic seals, gaskets and O-rings made of processed polytetrafluoroethylene (PTFE) have enhanced porosity and other physical properties
processed polytetrafluoroethylene (PTFE) having enhanced porosity and other physical properties
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.