Patents by Inventor Naokazu Ito

Naokazu Ito 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).

  • Cationically curable oxetanyl-containing naphthalene and aromatic epoxy or oxetane compound
    Patent number: 6469108
    Abstract: A naphthalene derivative, binaphthalene derivative and biphenyl derivative, all having an oxetane group, capable of being cationically polymerized and a cationically curable compound containing a naphthalene derivative having an oxetanyl group and an aromatic compound having an epoxy group or an oxetanyl group.
    Type: Grant
    Filed: December 13, 2001
    Date of Patent: October 22, 2002
    Assignee: Toagosei Co., Ltd.
    Inventors: Akira Kuriyama, Naokazu Ito, Tetsuya Suzuta, Takashi Tsuda
  • Naphthalene derivative, binaphthalene derivative and biphenyl derivative and cationically curable compound
    Publication number: 20020103330
    Abstract: A naphthalene derivative, binaphthalene derivative and biphenyl derivative, all having an oxetane group, capable of being cationically polymerized and a cationically curable compound containing a naphthalene derivative having an oxetanyl group and an aromatic compound having an epoxy group or an oxetanyl group.
    Type: Application
    Filed: December 13, 2001
    Publication date: August 1, 2002
    Applicant: Toagosei Co., Ltd.
    Inventors: Akira Kuriyama, Naokazu Ito, Tetsuya Suzuta, Takashi Tsuda
  • Naphthalene derivative, binaphthalene derivative and biphenyl derivative and cationically curable compound
    Patent number: 6365760
    Abstract: A naphthalene derivative, binaphthalene derivative and biphenyl derivative, all having an oxetane group, capable of being cationically polymerized and a cationically curable compound containing a naphthalene derivative having an oxetanyl group and an aromatic compound having an epoxy group or an oxetanyl group.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: April 2, 2002
    Assignee: Toagosei Co., Ltd.
    Inventors: Akira Kuriyama, Naokazu Ito, Tetsuya Suzuta, Takashi Tsuda
  • Process for producing 3-chloromethyl-3-alkyloxetanes
    Patent number: 5886199
    Abstract: The present invention is to provide for a process for producing 3-chloromethyl-3-alkyloxetanes from a 1,1-bis(chloromethyl)-1-hydroxymethylalkane or its carboxylate ester through a dehydrogen chloride reaction or a deacid chloride reaction in an aqueous solution or suspension of an alkaline compound. The reaction is conducted, either in the presence of a phase transfer catalyst or an anion exchange resin having an ammonium group, or, while distilling the formed 3-chloromethyl-3-alkyloxetane out azeotropically with water. The invention enables one to produce 3-chloromethyl-3-alkyloxetanes within a shorter period of time and with a higher yield, and thus the process is much advantageous and useful from the industrial points of view.
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: March 23, 1999
    Assignee: Toagosei Co., Ltd.
    Inventors: Naokazu Ito, Toshiro Hirose