Patents by Inventor Atsushi Igami

Atsushi Igami 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 for coloring cellulose fiber and colored cellulose fiber obtained thereby
    Patent number: 7481848
    Abstract: A method for producing a colored cellulose fiber, comprising: a step (1) of introducing a carboxylic group or a sulfonic acid group into cellulose fiber, and a step (2) of treating the cellulose fiber having the carboxylic group or the sulfonic acid group introduced with an aromatic derivative having one or more hydroxyl groups and a metal salt simultaneously or separately, and a colored cellulose fiber produced by the same method.
    Type: Grant
    Filed: November 8, 2004
    Date of Patent: January 27, 2009
    Assignee: Kurashiki Boseki Kabushiki Kaisha
    Inventors: Masahiro Nakazaki, Kunihiro Ohshima, Susumu Katsuen, Atsushi Igami
  • Method for coloring cellulose fiber and colored cellulose fiber obtained thereby
    Publication number: 20070033741
    Abstract: A method for producing a colored cellulose fiber, comprising: a step (1) of introducing a carboxylic group or a sulfonic acid group into cellulose fiber, and a step (2) of treating the cellulose fiber having the carboxylic group or the sulfonic acid group introduced with an aromatic derivative having one or more hydroxyl-groups and a metal salt simultaneously or separately, and a colored cellulose fiber produced by the same method.
    Type: Application
    Filed: November 8, 2004
    Publication date: February 15, 2007
    Applicant: KURASHIKI BOSEKI KABUSHIKI KAISHA
    Inventors: Masahiro Nakazaki, Kunihiro Ohshima, Susumu Katsuen, Atsushi Igami