Patents by Inventor Hirotaka Kofune

Hirotaka Kofune has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Curable polyvinyl benzyl compound and process for producing the same
    Patent number: 7514379
    Abstract: A curable polyvinyl benzyl compound represented by the following general formula (1): wherein R1 represents a C2-20 organic group, R2 represents a hydrogen atom, etc., x is an integer of 0 to 4, and n is an integer of 0 to 2. The compound is obtained by reacting a fluorene compound with a vinylbenzyl halide in the presence of an alkali.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: April 7, 2009
    Assignee: Showa Highpolymer Co., Ltd.
    Inventors: Shouji Nishiguchi, Tatsuhiro Ikeya, Haruo Yoshida, Jyouji Shibata, Hirotaka Kofune
  • Curable polyvinyl benzyl compound and process for producing the same
    Publication number: 20080113176
    Abstract: A curable polyvinyl benzyl compound represented by the following general formula (1) wherein R1 represents a C2-20 organic group, R2 represents a hydrogen atom, etc., x is an integer of 0 to 4, and n is an integer of 0 to 2. The compound is obtained by reacting a fluorene compound with a vinylbenzyl halide in the presence of an alkali.
    Type: Application
    Filed: January 3, 2008
    Publication date: May 15, 2008
    Inventors: Shouji Nishiguchi, Tatsuhiro Ikeya, Haruo Yoshida, Jyouji Shibata, Hirotaka Kofune
  • Curable polyvinyl benzyl compound and process for producing the same
    Publication number: 20050176909
    Abstract: A curable polyvinyl benzyl compound represented by the following general formula (1): wherein R1 represents a C2-20 organic group, R2 represents a hydrogen atom, etc., x is an integer of 0 to 4, and n is an integer of 0 to 2. The compound is obtained by reacting a fluorene compound with a vinylbenzyl halide in the presence of an alkali.
    Type: Application
    Filed: October 1, 2004
    Publication date: August 11, 2005
    Inventors: Shouji Nishiguchi, Tatsuhiro Ikeya, Haruo Yoshida, Jyouji Shibata, Hirotaka Kofune