Patents by Inventor Naotaka Izumi

Naotaka Izumi 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).

  • Publication number: 20230176822
    Abstract: An information processing apparatus includes a memory and a processor. The memory stores an application having a WebView function, and an operating system supporting a programming language other than a specific programming language. The processor, when being executed, communicates with a server that provides an application programming interface (API) that is based on the specific programming language, and reads native implementation of the application in response to receiving a response from the API.
    Type: Application
    Filed: October 3, 2022
    Publication date: June 8, 2023
    Applicant: Ricoh Company, Ltd.
    Inventor: Naotaka Izumi
  • Patent number: 7906579
    Abstract: A aqueous modified polyisocyanate intended to be dispersed in an aqueous medium for use and obtained by reacting an HDI derivative with (A) a modifying agent composed of a methoxy polyoxyalkylene glycol mainly comprising an ethylene oxide unit, (B) a modifying agent composed of a hydroxyl group-terminated polyoxyalkylene glycol produced by using an alcohol having 8 or more carbon atoms as an initiator and mainly comprising a propylene oxide unit, and (C) a modifying agent composed of an ester compound having at least one hydroxyl group with an alkali metal salt of sulfonic acid introduced therein, wherein the concentration (calculated value) of the alkali metal salt of sulfonic acid derived from the modifying agent (C) is 1.5 to 25 ?mol/g. The aqueous modified polyisocyanate is not only excellent in dispersion stability in water but also excellent in stability of the isocyanate group in water even under temperature conditions of 35 ° C. or higher.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: March 15, 2011
    Assignee: Nippon Polyurethane Industry Co., Ltd.
    Inventors: Takaki Jono, Naotaka Izumi, Iku Ohki, Mitsuru Chiba
  • Publication number: 20100184914
    Abstract: [Problem] To improve the previous aqueous one-component coating polyurethane emulsion among the aqueous one-component type polyurethane resin coating agents utilizing the blocked isocyanate compounds, in order to improve aqueous dispersibility and the storage stability of the emulsion as well as various coating performances of the coating appearing around the dissociation temperature of the blocking groups.
    Type: Application
    Filed: August 7, 2007
    Publication date: July 22, 2010
    Applicant: NIPPON POLYURETHANE INDUSTRY CO., LTD.
    Inventors: Takaki Jono, Naotaka Izumi, Iku Ohki, Mitsuru Chiba
  • Publication number: 20090209711
    Abstract: An aqueous modified polyisocyanate intended to be dispersed in an aqueous medium for use and obtained by reacting an HDI derivative with (A) a modifying agent composed of a methoxy polyoxyalkylene glycol mainly comprising an ethylene oxide unit, (B) a modifying agent composed of a hydroxyl group-terminated polyoxyalkylene glycol produced by using an alcohol having 8 or more carbon atoms as an initiator and mainly comprising a propylene oxide unit, and (C) a modifying agent composed of an ester compound having at least one hydroxyl group with an alkali metal salt of sulfonic acid introduced therein, wherein the concentration (calculated value) of the alkali metal salt of sulfonic acid derived from the modifying agent (C) is 1.5 to 25 ?mol/g. The aqueous modified polyisocyanate is not only excellent in dispersion stability in water but also excellent in stability of the isocyanate group in water even under temperature conditions of 35° C. or higher.
    Type: Application
    Filed: April 17, 2007
    Publication date: August 20, 2009
    Applicant: NIPPON POLYURETHANE INDUSTRY CO., LTD
    Inventors: Takaki Jono, Naotaka Izumi, Iku Ohki, Mitsuru Chiba
  • Patent number: 7405258
    Abstract: [PROBLEMS] The invention is to provide an aqueous one-component coating agent that is environmentally friendly and safe, and is excellent in productivity and storage stability, and also in alkali resistance and solvent resistance of a coated film. [MEANS FOR SOLVING PROBLEMS] The problems are solved by providing a method for producing polyurethane emulsion for an aqueous one-component coating agent, comprising: reacting an organic diisocyanate (a1), a high molecular weight polyol (a2) and a low molecular weight glycol containing a carboxyl group (a3) to produce an isocyanate-terminated urethane prepolymer having a carboxyl group (A); mixing the urethane prepolymer (A) with a polyisocyanate containing a nonionic polar group (B); neutralizing the carboxyl group in the system with a neutralizing agent (C); and subjecting the mixture to emulsification in water and chain extension with water or an amine.
    Type: Grant
    Filed: February 1, 2005
    Date of Patent: July 29, 2008
    Assignee: Nippon Polyurethane Industry Co., Ltd.
    Inventors: Naotaka Izumi, Takeshi Morishima, Iku Ohki, Mitsushige Ikemoto
  • Publication number: 20070155894
    Abstract: [PROBLEMS] The invention is to provide an aqueous one-component coating agent that is environmentally friendly and safe, and is excellent in productivity and storage stability, and also in alkali resistance and solvent resistance of a coated film. [MEANS FOR SOLVING PROBLEMS] The problems are solved by providing a method for producing polyurethane emulsion for an aqueous one-component coating agent, comprising: reacting an organic diisocyanate (a1), a high molecular weight polyol (a2) and a low molecular weight glycol containing a carboxyl group (a3) to produce an isocyanate-terminated urethane prepolymer having a carboxyl group (A); mixing the urethane prepolymer (A) with a polyisocyanate containing a nonionic polar group (B); neutralizing the carboxyl group in the system with a neutralizing agent (C); and subjecting the mixture to emulsification in water and chain extension with water or an amine.
    Type: Application
    Filed: February 1, 2005
    Publication date: July 5, 2007
    Inventors: Naotaka Izumi, Takeshi Morishima, Iku Ohki, Mitsushige Ikemoto