Nakahara; Sei

Patent Applications and Registrations

Patent applications and USPTO patent grants for Nakahara; Sei.The latest application filed is for "polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin".

Company Profile

0.31.32

Nakahara; Sei - Himeji N/A JP
Nakahara; Sei - Hyogo JP
Nakahara; Sei - Himeji-shi JP
Nakahara; Sei - Hineji JP
Nakahara; Sei - Hyogo-Ken JP

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin Grant 9,062,140 - Fujimaru , et al. June 23, 2	2015-06-23
Reactor filled with solid particle and gas-phase catalytic oxidation with the reactor Grant 7,534,339 - Matsumoto , et al. May 19, 2	2009-05-19
Polyacrylic Acid (Salt) Water-Absorbent Resin, Production Process Thereof, and Acrylic Acid Used in Polymerization for Production of Water-Absorbent Resin App 20080119626 - Fujimaru; Hirotama ; et al.	2008-05-22
Method for starting up reactor Grant 7,326,810 - Hirao , et al. February 5, 2	2008-02-05
Method for production of (meth)acrylic acid by use of a shell-and-tube heat exchanger Grant 7,326,811 - Mitsumoto , et al. February 5, 2	2008-02-05
Method for distilling (meth)acrylic acid and/or the ester thereof Grant 7,319,167 - Nakahara , et al. January 15, 2	2008-01-15
Method for production of easily polymerizable substance and purification apparatus Grant 7,282,118 - Mitsumoto , et al. October 16, 2	2007-10-16
Shell-and-tube type heat exchanger and method for production of (meth) acrylic acid by use of the exchange App 20070034363 - Mitsumoto; Tetsuji ; et al.	2007-02-15
Reactor filled with solid particle and gas-phase catalytic oxidation with the reactor App 20070003460 - Matsumoto; Yukihiro ; et al.	2007-01-04
Shell-and-tube type heat exchanger and method for production of (meth) acrylic acid by use of the exchange Grant 7,147,048 - Mitsumoto , et al. December 12, 2	2006-12-12
Method for purification of acrylic acid Grant 7,048,834 - Ishii , et al. May 23, 2	2006-05-23
Acrylic acid composition and its production process, and process for producing water-absorbent resin using this acrylic acid composition, and water-absorbent resin Grant 7,049,366 - Nakahara , et al. May 23, 2	2006-05-23
Method for producing polyacrylic acid Grant 7,038,081 - Matsumoto , et al. May 2, 2	2006-05-02
Apparatus and process for producing (meth)acrylic acid Grant 6,966,973 - Nakahara , et al. November 22, 2	2005-11-22
Packed column and polymerizable compound treating method using the same Grant 6,891,061 - Nishimura , et al. May 10, 2	2005-05-10
Method for preventing plate type heat exchanger from blockage Grant 6,848,501 - Hirao , et al. February 1, 2	2005-02-01
Method for distilling (meth)acrylic acid and/or the ester thereof App 20040230074 - Nakahara, Sei ; et al.	2004-11-18
Method for distilling (meth) acrylic acid solution Grant 6,787,001 - Sakamoto , et al. September 7, 2	2004-09-07
Acrylic acid composition and its production process, and process for producing water- absorbent resin using this acrylic acid composition, and water-absorbent resin App 20040110914 - Nakahara, Sei ; et al.	2004-06-10
Heat-exchanging method for easily polymerizable compound Grant 6,736,200 - Okazaki , et al. May 18, 2	2004-05-18
Method for production of (meth) acrylic acid and/or (meth)acrylic esters Grant 6,695,928 - Nakahara , et al. February 24, 2	2004-02-24
Method for starting up distilling column Grant 6,676,808 - Hamamoto , et al. January 13, 2	2004-01-13
Method for inhibiting polymerization of a vinyl compound Grant 6,664,418 - Sakamoto , et al. December 16, 2	2003-12-16
Process for producing (meth)acrylic ester Grant 6,660,881 - Matsumoto , et al. December 9, 2	2003-12-09
Method for mixing gases and apparatus therefor Grant 6,657,079 - Mitsumoto , et al. December 2, 2	2003-12-02
Method for cooling heating grade heat exchanger in unsteady state Grant 6,651,731 - Nishimura , et al. November 25, 2	2003-11-25
Column treating process and apparatus thereof Grant 6,649,028 - Sakamoto , et al. November 18, 2	2003-11-18
Method for preparing (meth) acrylic acid ester Grant 6,649,787 - Nakahara , et al. November 18, 2	2003-11-18
Method for production of (meth) acrylic acid Grant 6,642,414 - Mitsumoto , et al. November 4, 2	2003-11-04
Method for producing polyacrylic acid App 20030181621 - Matsumoto, Yukihiro ; et al.	2003-09-25
Method for stopping purifying column Grant 6,613,196 - Hamamoto , et al. September 2, 2	2003-09-02
Process for treating wastes from acrylic acid and polyacrylic acid production processes App 20030143143 - Matsumoto, Yukihiro ; et al.	2003-07-31
Method for preventing polymerization of (meth)acrylic acid and esters thereof and method for the production thereof Grant 6,599,397 - Sakamoto , et al. July 29, 2	2003-07-29
Method for preventing plate type heat exchanger from blockage App 20030111216 - Hirao, Harunori ; et al.	2003-06-19
Shell-and-tube type heat exchanger and method for production of (meth) acrylic acid by use of the exchange App 20030089491 - Mitsumoto, Tetsuji ; et al.	2003-05-15
Reactor filled with solid particle and gas-phase catalytic oxidation with the reactor App 20030006026 - Matsumoto, Yukihiro ; et al.	2003-01-09
Column treating process and apparatus therefor App 20020189927 - Sakamoto, Kazuhiko ; et al.	2002-12-19
Apparatus and process for producing (meth)acrylic acid App 20020165407 - Nakahara, Sei ; et al.	2002-11-07
Method for distilling (meth) acrylic acid solution App 20020134660 - Sakamoto, Kazuhiko ; et al.	2002-09-26
Hydrophilic resin, absorbent article, and acrylic acid for polymerization Grant 6,444,744 - Fujimaru , et al. September 3, 2	2002-09-03
Apparatus and process for producing (meth)acrylic acid Grant 6,441,228 - Nakahara , et al. August 27, 2	2002-08-27
Method for cooling heating grade heat exchanger in unsteady state App 20020104644 - Nishimura, Takeshi ; et al.	2002-08-08
Liquid withdrawing tray for purification column, purification column, and method for purification App 20020098123 - Matsumoto, Hajime ; et al.	2002-07-25
Method for handling waste oil Grant 6,414,183 - Sakamoto , et al. July 2, 2	2002-07-02
Method for starting up reactor App 20020037488 - Hirao, Harunori ; et al.	2002-03-28
Method for stopping purifying column App 20020027067 - Hamamoto, Kei ; et al.	2002-03-07
Process for producing (meth)acrylic ester App 20020022739 - Matsumoto, Hajime ; et al.	2002-02-21
Method for starting up distilling column App 20020008010 - Hamamoto, Kei ; et al.	2002-01-24
Solid substance removing device App 20020008064 - Hamamoto, Kei ; et al.	2002-01-24
Method for preventing polymerization of (meth) acrylic acid and esters thereof and method for the production thereof App 20020002253 - Sakamoto, Kazuhiko ; et al.	2002-01-03
Method for production of easily polymerizable substance and purification apparatus App 20010030120 - Mitsumoto, Tetsuji ; et al.	2001-10-18
Production process for hydroxyalkyl (meth)acrylate App 20010025120 - Shingai, Yasuhiro ; et al.	2001-09-27
Storage tank for viscous oil containing easily polymerizable compounds App 20010018931 - Ijiri, Yuichi ; et al.	2001-09-06
Method for producing acrylic acid App 20010020111 - Ueno, Kouji ; et al.	2001-09-06
Method for production of (meth) acrylic acid App 20010016668 - Mitsumoto, Tetsuji ; et al.	2001-08-23
Method for disposal of solid catalyst App 20010006930 - Nakahara, Sei ; et al.	2001-07-05
Heat-exchanging method for easily polymerizable compound App 20010006104 - Okazaki, Kazuto ; et al.	2001-07-05
Method for purification of acrylic acid App 20010004960 - Ishii, Yoshitake ; et al.	2001-06-28
Method of stabilizing N-oxyl compounds in vinyl compounds App 20010005755 - Sakamoto, Kazuhiko ; et al.	2001-06-28
Apparatus and process for producing (meth)acrylic acid App 20010005763 - Nakahara, Sei ; et al.	2001-06-28
Method for preventing effluent gas pipe from blocking App 20010003783 - Nishimura, Takeshi ; et al.	2001-06-14
Process for the production of acrylic acid Grant 5,785,821 - Sakamoto , et al. July 28, 1	1998-07-28