Inventor

HAMAGUCHI ITSUKO

JP3 patents

⚠️ This page may combine multiple inventors who share the name “HAMAGUCHI ITSUKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DAI ICHI KOGYO SEIYAKU CO LTD

2 patents

US6486281B1Nov 26, 2002

Process for preparing high-purity vinylpyrrolidone polymer

DAI ICHI KOGYO SEIYAKU CO LTD14 citations80

US6465592B1Oct 15, 2002

Process for preparing vinylpyrrolidone polymer

DAI ICHI KOGYO SEIYAKU CO LTD9 citations70

NIPPON CATALYTIC CHEM IND

1 patent

US7700674B2Apr 20, 2010

Vinylpyrrolidone-based polymer composition

NIPPON CATALYTIC CHEM IND0 citations44