Patents by Inventor Tatsuya DAN

Tatsuya DAN 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).

  • Patent number: 10833358
    Abstract: To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon having pores having a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of a positive electrode film including the positive-electrode active material defined by Formula (1) below is less than 45%.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: November 10, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Abe, Yoshio Itoh, Tatsuya Dan, Yuka Araki, Shuhei Takeshita
  • Patent number: 10811674
    Abstract: A non-aqueous electrolyte electricity-storage element which includes a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material, and a non-aqueous electrolyte, wherein the positive-electrode active material is formed of a carbonaceous material, and a surface of the carbonaceous material includes fluorine.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: October 20, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Abe, Yoshio Itoh, Tatsuya Dan, Yuka Araki, Shuhei Takeshita
  • Publication number: 20200044277
    Abstract: To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon having pores having a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of a positive electrode film including the positive-electrode active material defined by Formula (1) below is less than 45%.
    Type: Application
    Filed: October 11, 2019
    Publication date: February 6, 2020
    Inventors: Naoto ABE, Yoshio ITOH, Tatsuya DAN, Yuka ARAKI, Shuhei TAKESHITA
  • Patent number: 10490846
    Abstract: To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon having pores having a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of a positive electrode film including the positive-electrode active material defined by Formula (1) below is less than 45%.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: November 26, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoto Abe, Yoshio Itoh, Tatsuya Dan, Yuka Araki, Shuhei Takeshita
  • Publication number: 20190190027
    Abstract: An active material is provided. The active material comprises a porous carbon having a plurality of pores forming a three-dimensional network structure and a conductive polymer, and at least a part of the plurality of pores contains the conductive polymer.
    Type: Application
    Filed: December 6, 2018
    Publication date: June 20, 2019
    Inventors: Shuhei Takeshita, Masayoshi Nomura, Naoto Abe, Yoshio Itoh, Tatsuya Dan, Yuka Araki, Naoki Sugihara
  • Patent number: 10297828
    Abstract: To provide a non-aqueous electrolyte storage element including a positive electrode including a positive-electrode active material capable of inserting and eliminating anions, a negative electrode including a negative-electrode active material, and a non-aqueous electrolyte, wherein the positive-electrode active material includes a carbon material which has a plurality of pores constituting a three-dimensional network structure and has a solid electrolyte interface (SEI) material on a surface of the carbon material.
    Type: Grant
    Filed: June 1, 2017
    Date of Patent: May 21, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuka Araki, Naoto Abe, Yoshio Itoh, Tatsuya Dan, Shuhei Takeshita
  • Publication number: 20190051465
    Abstract: A non-aqueous electrolyte storage element has a positive electrode including a positive electrode active material allowing intercalation or deintercalation of anions, a negative electrode including a negative electrode active material, a non-aqueous electrolytic solution, and a separator disposed between the positive electrode and the negative electrode to hold the non-aqueous electrolytic solution. The positive electrode active material is carbon having pores of a three-dimensional network structure, and the carbon contains a carbonate salt. The carbon may contain the carbonate salt at least inside the three-dimensional network structure. The carbonate salt may be mixed into the carbon. At least a portion of a surface of the carbon may be covered with the carbonate salt.
    Type: Application
    Filed: July 13, 2016
    Publication date: February 14, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuka ARAKI, Naoto ABE, Yoshio ITOH, Tatsuya DAN, Shuhei TAKESHITA
  • Publication number: 20180337429
    Abstract: Provided is a non-aqueous electrolyte electricity-storage element, which includes: a positive electrode including a positive-electrode active material capable of inserting and eliminating anions; a negative electrode including a negative-electrode active material; a non-aqueous electrolyte; and a separator that is disposed between the positive electrode and the negative electrode and retains the non-aqueous electrolyte, wherein the non-aqueous electrolyte includes a dinitrile compound, and an amount of the dinitrile compound is 33% by mass or less relative to the non-aqueous electrolyte.
    Type: Application
    Filed: May 15, 2018
    Publication date: November 22, 2018
    Inventors: Yuka ARAKI, Naoto ABE, Yoshio ITOH, Tatsuya DAN, Shuhei TAKESHITA, Yasutaka TANAKA
  • Publication number: 20180062174
    Abstract: A nonaqueous electrolytic solution storage element is provided. The nonaqueous electrolytic solution storage element includes a cathode containing a cathode active material, an anode containing an anode active material to which sodium ion is insertable and from which the sodium ion is separable, and a nonaqueous electrolytic solution. The anode active material comprises a porous carbon having a plurality of pores forming a three-dimensional network structure, and the porous carbon has crystallinity.
    Type: Application
    Filed: August 7, 2017
    Publication date: March 1, 2018
    Inventors: Shuhei TAKESHITA, Naoto ABE, Yoshio ITOH, Tatsuya DAN, Yuka ARAKI
  • Patent number: 9904190
    Abstract: A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.
    Type: Grant
    Filed: February 2, 2015
    Date of Patent: February 27, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Dan, Tohru Moriya, Tomomi Suzuki, Kohtaroh Ogino
  • Publication number: 20170365852
    Abstract: To provide a non-aqueous electrolyte storage element including a positive electrode including a positive-electrode active material capable of inserting and eliminating anions, a negative electrode including a negative-electrode active material, and a non-aqueous electrolyte, wherein the positive-electrode active material includes a carbon material which has a plurality of pores constituting a three-dimensional network structure and has a solid electrolyte interface (SEI) material on a surface of the carbon material.
    Type: Application
    Filed: June 1, 2017
    Publication date: December 21, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yuka ARAKI, Naoto ABE, Yoshio ITOH, Tatsuya DAN, Shuhei TAKESHITA
  • Publication number: 20170352912
    Abstract: To provide a non-aqueous electrolyte electricity-storage element including a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material capable of inserting and releasing cations, and a non-aqueous electrolyte, wherein the positive-electrode active material is porous carbon having pores having a three-dimensional network structure, and wherein a changing rate of a cross-sectional thickness of a positive electrode film including the positive-electrode active material defined by Formula (1) below is less than 45%.
    Type: Application
    Filed: August 23, 2017
    Publication date: December 7, 2017
    Inventors: Naoto ABE, Yoshio ITOH, Tatsuya DAN, Yuka ARAKI, Shuhei TAKESHITA
  • Publication number: 20170346072
    Abstract: A non-aqueous electrolyte electricity-storage element which includes a positive electrode including a positive-electrode active material capable of inserting and releasing anions, a negative electrode including a negative-electrode active material, and a non-aqueous electrolyte, wherein the positive-electrode active material is formed of a carbonaceous material, and a surface of the carbonaceous material includes fluorine.
    Type: Application
    Filed: August 15, 2017
    Publication date: November 30, 2017
    Inventors: Naoto ABE, Yoshio ITOH, Tatsuya DAN, Yuka ARAKI, Shuhei TAKESHITA
  • Publication number: 20170082933
    Abstract: A toner, including: a binder resin; and calcium carbonate, wherein the toner has a molecular weight distribution having a main peak in a range of 1,000 to 10,000, and a half value width of the main peak is 8,000 to 30,000, where the molecular weight distribution is obtained by GPC (gel permeation chromatography) of THF soluble matter of the toner, and wherein the toner contains the calcium carbonate in an amount of 5% by mass to 35% by mass.
    Type: Application
    Filed: February 2, 2015
    Publication date: March 23, 2017
    Inventors: Tatsuya DAN, Tohru MORIYA, Tomomi SUZUKI, Kohtaroh OGINO