Inventor
OKA YOSHIHISA
JP8 patents
⚠️ This page may combine multiple inventors who share the name “OKA YOSHIHISA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON CATALYTIC CHEM IND
6 patentsUS6437199B1Aug 20, 2002
Method for production of high-purity monoethylene glycol
NIPPON CATALYTIC CHEM IND35 citations92
US6417411B2Jul 9, 2002
Method for production of ethylene glycol
NIPPON CATALYTIC CHEM IND18 citations81
US6514908B1Feb 4, 2003
Method for exchange of catalysts
NIPPON CATALYTIC CHEM IND2 citations61
US6566534B2May 20, 2003
Processes for the preparation of aziridine compounds and vapor-phase reaction processes
NIPPON CATALYTIC CHEM IND2 citations59
US6550485B2Apr 22, 2003
Washing method for distillation system of nitrogen-containing polymerizable monomers
NIPPON CATALYTIC CHEM IND4 citations59
US6924378B2Aug 2, 2005
Method for production of aziridines and N-vinylamides
NIPPON CATALYTIC CHEM IND0 citations38