Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Extraction of N-methylpyrrolidone-2

Extraction of N-methylpyrrolidone-2

US Patent 4472585 · Granted Sep 18, 1984

Estimated economic value: $6,113,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Apparatus for communicating a change in system configuration in an information h1996
Heat resistant polymers and blends of hydroquinone poly (isoterephthalates) cont1994
High strength polymers and blends of hydroquinone poly(iso-terephthalates) conta1993
High strength polymers and blends of hydroquinone poly(iso-terephthalates) conta1993
High strength polymer of hydroquinone poly(iso-terephthalate) containing residue1992
Hydroquinone poly(iso-terephthalates) containing residues of p-hydroxybenzoic ac1992
High modulus, high strength melt-processible polyester of hydroquinone poly (iso1992
Wholly aromatic polyesters with reduced char content1990
Arylene sulfide terpolymers and processes for making them1989
Production of aromatic sulfide/ketone polymers with alkali metal carbonate1989
Purification of N-methylpyrrolidone1985
N-Methyl pyrrolidone-2 purification1985