U.S. federal trademark · Serial No. 75262134 · Reg. No. 2121908
fibrous, porous materials in tissue-like sheets in single and multi-layered sheets, in strips in cylindrical and cup shapes, in membranes, mats, and gauzes, all made of pure polytrafluorethylene and of polytetrafluorethylene in combination with other synthetic resins, synthetic organic and inorganic substances
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