Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Method for preparing (co) polymers by metal-free anionic polymerization in the presence of a phosphonium cation containing at least one annellated aromatic ring

US Patent 6143847 · Granted Nov 7, 2000

Estimated economic value: $207,000

Assignee

Inventors

View full patent text on Google Patents →