Patents by Inventor Takahito Ikeshita

Takahito Ikeshita 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).

  • Process for manufacturing paperboard
    Patent number: 9546452
    Abstract: A method of producing a paper board comprising: a pulping step of disintegrating and beating fibers from a pulp raw material containing waste paper as a main raw material to obtain pulping process water; a stock preparation step of adding an additive containing a paper strength additive to the obtained pulping process water to obtain a prepared pulp raw material; and a paper-making step of making the obtained prepared pulp raw material into a paper board, wherein the paper board is produced by adding (a) an aqueous solution of hypochlorite and (b) an aqueous solution of water-soluble inorganic ammonium salt or ammonia water to the pulping process water to reduce the amount of the paper strength additive added in the stock preparation step.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: January 17, 2017
    Assignees: KATAYAMA CHEMICAL, INC., NALCO JAPAN G.K.
    Inventors: Takahito Ikeshita, Yuji Fuchino, Hideaki Shimomoto, Hiroshi Hasegawa
  • PROCESS FOR MANUFACTURING PAPERBOARD
    Publication number: 20150167248
    Abstract: A method of producing a paper board comprising: a pulping step of disintegrating and beating fibers from a pulp raw material containing waste paper as a main raw material to obtain pulping process water; a stock preparation step of adding an additive containing a paper strength additive to the obtained pulping process water to obtain a prepared pulp raw material; and a paper-making step of making the obtained prepared pulp raw material into a paper board, wherein the paper board is produced by adding (a) an aqueous solution of hypochlorite and (b) an aqueous solution of water-soluble inorganic ammonium salt or ammonia water to the pulping process water to reduce the amount of the paper strength additive added in the stock preparation step.
    Type: Application
    Filed: June 24, 2013
    Publication date: June 18, 2015
    Applicants: KATAYAMA CHEMICAL, INC., NALCO JAPAN G.K.
    Inventors: Takahito Ikeshita, Yuji Fuchino, Hideaki Shimomoto, Hiroshi Hasegawa