Inventor · disambiguated record
Yoshihisa Oka
Also filed as: OKA YOSHIHISA
8 granted patents·1 pending application·67 citations·filing 2000–2011
84Inventor score
Top patents by PatentIndex Score
9 records- 0192US6437199B1Method for production of high-purity monoethylene glycolNIPPON CATALYTIC CHEM IND·Filed 2000·Granted Aug 20, 2002·35 cites·12 claims
- 0284US6417411B2Method for production of ethylene glycolNIPPON CATALYTIC CHEM IND·Filed 2001·Granted Jul 9, 2002·18 cites·10 claims
- 0373US9096516B2Production method of N-vinyl-2-pyrrolidoneSUGIURA HIDETO·Filed 2011·Granted Aug 4, 2015·4 cites·11 claims
- 0460US6566534B2Processes for the preparation of aziridine compounds and vapor-phase reaction processesNIPPON CATALYTIC CHEM IND·Filed 2001·Granted May 20, 2003·2 cites·5 claims
- 0555US6514908B1Method for exchange of catalystsNIPPON CATALYTIC CHEM IND·Filed 2000·Granted Feb 4, 2003·2 cites·2 claims
- 0650US6550485B2Washing method for distillation system of nitrogen-containing polymerizable monomersNIPPON CATALYTIC CHEM IND·Filed 2001·Granted Apr 22, 2003·4 cites·10 claims
- 0746US6300507B2Process of manufacturing ethylene oxideNIPPON SHUKUBAI CO LTD·Filed 2000·Granted Oct 9, 2001·2 cites·13 claims
- 0843US2009088579A1Production Method of N-Vinyl-2-PyrrolidoneNIPPON CATALYTIC CHEM IND·Filed 2006·Application pending·0 cites
- 0940US6924378B2Method for production of aziridines and N-vinylamidesNIPPON CATALYTIC CHEM IND·Filed 2003·Granted Aug 2, 2005·0 cites·1 claims
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