Patents by Inventor Ichishi Aizu

Ichishi Aizu 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).

  • Method of producing novolak resin
    Patent number: 7345132
    Abstract: Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
    Type: Grant
    Filed: January 19, 2005
    Date of Patent: March 18, 2008
    Assignee: Chang Chun Plastics Co. Ltd
    Inventors: Noriaki Saito, Ichishi Aizu, Nobuyuki Nakajima, Masahiro Fujiwara, Koji Yano
  • Method of producing novolak resin
    Patent number: 6936680
    Abstract: Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: August 30, 2005
    Assignee: Chang Chun Plastics Co., Ltd.
    Inventors: Noriaki Saito, Ichishi Aizu, Nobuyuki Nakajima, Masahiro Fujiwara, Koji Yano
  • Method of producing novolak resin
    Publication number: 20050124778
    Abstract: Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
    Type: Application
    Filed: January 19, 2005
    Publication date: June 9, 2005
    Inventors: Noriaki Saito, Ichishi Aizu, Nobuyuki Nakajima, Masahiro Fujiwara, Koji Yano
  • Method of producing novolak resin
    Publication number: 20020091224
    Abstract: Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
    Type: Application
    Filed: December 4, 2001
    Publication date: July 11, 2002
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Noriaki Saito, Ichishi Aizu, Nobuyuki Nakajima, Masahiro Fujiwara, Koji Yano