U.S. federal trademark · Serial No. 76367799 · Reg. No. 2685976
chemicals, namely, cross-linked polyvinylpyrrolidone, vinylpyrrolidone/vinylimidazole copolymers as complexing agents for isolation and stabilization of heavy metal ions and as dye transfer inhibitors in detergents, anionic colorants, polymers and tanning agents for general industrial use
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