Inventor
WU CHI-SAN
US11 patents
⚠️ This page may combine multiple inventors who share the name “WU CHI-SAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ISP INVESTMENTS INC
9 patentsUS5262171ANov 16, 1993
Pharmaceutical tablet with PVP having enhanced drug dissolution rate
ISP INVESTMENTS INC57 citations95
US6331333B1Dec 18, 2001
Storage stabilized oxygen degradable polymer
ISP INVESTMENTS INC27 citations88
US5338814AAug 16, 1994
Process for making narrow molecular weight distribution polyvinylpyrrolidone K-90 polymers
ISP INVESTMENTS INC19 citations80
US5373074ADec 13, 1994
Free radical solution polymerization of vinylpyrrolidone
ISP INVESTMENTS INC19 citations72
US5739183AApr 14, 1998
Colorless, non-toxic, stabilized aqueous solution of a C1 -C5 alkyl vinyl ether and maleic acid copolymer
ISP INVESTMENTS INC1 citations50
US5621136AApr 15, 1997
Colorless, non-toxic, stabilized aqueous solution of a C1-C5 alkyl vinyl ether and maleic acid copolymer
ISP INVESTMENTS INC0 citations50
US6620900B2Sep 16, 2003
Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
ISP INVESTMENTS INC1 citations48
US6806334B2Oct 19, 2004
Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
ISP INVESTMENTS INC1 citations47
US6418702B2Jul 16, 2002
Storage stabilized oxygen degradable polymer
ISP INVESTMENTS INC0 citations47