Inventor
NAKAHARA SEI
JP41 patents
⚠️ This page may combine multiple inventors who share the name “NAKAHARA SEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON CATALYTIC CHEM IND
40 patentsUS6444744B1Sep 3, 2002
Hydrophilic resin, absorbent article, and acrylic acid for polymerization
NIPPON CATALYTIC CHEM IND114 citations98
US7049366B2May 23, 2006
Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin
NIPPON CATALYTIC CHEM IND24 citations92
US6787001B2Sep 7, 2004
Method for distilling (meth) acrylic acid solution
NIPPON CATALYTIC CHEM IND20 citations92
US6482981B2Nov 19, 2002
Method for producing acrylic acid
NIPPON CATALYTIC CHEM IND41 citations92
US6441228B2Aug 27, 2002
Apparatus and process for producing (meth)acrylic acid
NIPPON CATALYTIC CHEM IND18 citations92
US6414183B1Jul 2, 2002
Method for handling waste oil
NIPPON CATALYTIC CHEM IND45 citations92
US6348135B1Feb 19, 2002
Process for the purification of (meth) acrylic acid and/or its ester
NIPPON CATALYTIC CHEM IND20 citations92
US5785821AJul 28, 1998
Process for the production of acrylic acid
NIPPON CATALYTIC CHEM IND30 citations92
US6676808B2Jan 13, 2004
Method for starting up distilling column
NIPPON CATALYTIC CHEM IND19 citations91
US7319167B2Jan 15, 2008
Method for distilling (meth)acrylic acid and/or the ester thereof
NIPPON CATALYTIC CHEM IND10 citations84
US6966973B2Nov 22, 2005
Apparatus and process for producing (meth)acrylic acid
NIPPON CATALYTIC CHEM IND12 citations84
US6891061B1May 10, 2005
Packed column and polymerizable compound treating method using the same
NIPPON CATALYTIC CHEM IND15 citations84
US6695928B1Feb 24, 2004
Method for production of (meth) acrylic acid and/or (meth)acrylic esters
NIPPON CATALYTIC CHEM IND13 citations84
US6540881B1Apr 1, 2003
Method for refining (meth)acrylic acid
NIPPON CATALYTIC CHEM IND14 citations84
US7282118B2Oct 16, 2007
Method for production of easily polymerizable substance and purification apparatus
NIPPON CATALYTIC CHEM IND16 citations83
US6848501B2Feb 1, 2005
Method for preventing plate type heat exchanger from blockage
NIPPON CATALYTIC CHEM IND16 citations83
US7534339B2May 19, 2009
Reactor filled with solid particle and gas-phase catalytic oxidation with the reactor
NIPPON CATALYTIC CHEM IND13 citations82
US6657079B1Dec 2, 2003
Method for mixing gases and apparatus therefor
NIPPON CATALYTIC CHEM IND17 citations82
US6649787B1Nov 18, 2003
Method for preparing (meth) acrylic acid ester
NIPPON CATALYTIC CHEM IND7 citations74
US7147048B2Dec 12, 2006
Shell-and-tube type heat exchanger and method for production of (meth) acrylic acid by use of the exchange
NIPPON CATALYTIC CHEM IND8 citations73
US6372944B1Apr 16, 2002
Liquid withdrawing tray for purification column, purification column, and method for purification
NIPPON CATALYTIC CHEM IND11 citations73
US6300513B2Oct 9, 2001
Method of stabilizing N-oxyl compounds in vinyl compounds
NIPPON CATALYTIC CHEM IND13 citations73
US6084127AJul 4, 2000
Method for recovering acrylic acid
NIPPON CATALYTIC CHEM IND11 citations73
US6649028B2Nov 18, 2003
Column treating process and apparatus thereof
NIPPON CATALYTIC CHEM IND12 citations72
US6642414B2Nov 4, 2003
Method for production of (meth) acrylic acid
NIPPON CATALYTIC CHEM IND12 citations71
US6599397B2Jul 29, 2003
Method for preventing polymerization of (meth)acrylic acid and esters thereof and method for the production thereof
NIPPON CATALYTIC CHEM IND12 citations71
US7038081B2May 2, 2006
Method for producing polyacrylic acid
NIPPON CATALYTIC CHEM IND2 citations63
US6736200B2May 18, 2004
Heat-exchanging method for easily polymerizable compound
NIPPON CATALYTIC CHEM IND3 citations62
US6664418B1Dec 16, 2003
Method for inhibiting polymerization of a vinyl compound
NIPPON CATALYTIC CHEM IND3 citations61
US6660881B2Dec 9, 2003
Process for producing (meth)acrylic ester
NIPPON CATALYTIC CHEM IND3 citations61
US6613196B2Sep 2, 2003
Method for stopping purifying column
NIPPON CATALYTIC CHEM IND3 citations61
US6566551B2May 20, 2003
Method for preventing effluent gas pipe from blocking
NIPPON CATALYTIC CHEM IND2 citations61
US7048834B2May 23, 2006
Method for purification of acrylic acid
NIPPON CATALYTIC CHEM IND3 citations60
US6651731B2Nov 25, 2003
Method for cooling heating grade heat exchanger in unsteady state
NIPPON CATALYTIC CHEM IND5 citations59
US6469202B2Oct 22, 2002
Method for disposal of solid catalyst
NIPPON CATALYTIC CHEM IND6 citations59
US7326810B2Feb 5, 2008
Method for starting up reactor
NIPPON CATALYTIC CHEM IND1 citations52
US7326811B2Feb 5, 2008
Method for production of (meth)acrylic acid by use of a shell-and-tube heat exchanger
NIPPON CATALYTIC CHEM IND0 citations51
US6495045B2Dec 17, 2002
Solid substance removing device
NIPPON CATALYTIC CHEM IND0 citations50
US6588450B2Jul 8, 2003
Storage tank for viscous oil containing easily polymerizable compounds
NIPPON CATALYTIC CHEM IND0 citations48
US6452040B2Sep 17, 2002
Production process for hydroxyalkyl (meth)acrylate
NIPPON CATALYTIC CHEM IND0 citations48