Patents by Inventor Tetsuya Shoji

Tetsuya Shoji 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: 20250201457
    Abstract: A Sm—Fe—N-based magnetic material in which the use amount of Sm is further reduced while enhancing the saturation magnetization, and a production method thereof, are provided. The present disclosure discloses a Sm—Fe—N-based magnetic material including a main phase having a crystal structure of at least either Th2Zn17 type or Th2Ni17 type, wherein the main phase is represented by the molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh, where R1 is one or more rare earth elements other than Sm, La and Ce, and Zr, and M is one or more elements other than Fe, Co, Ni and rare earth elements, and an unavoidable impurity element, and 0.09?x?0.31, 0.24?y?0.60, 0.51?x+y?0.75, 0?z?0.10, 0?p+q?0.10, 0?s?0.10, and 2.9?h?3.1 are satisfied, and a production method thereof.
    Type: Application
    Filed: October 21, 2024
    Publication date: June 19, 2025
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, THE UNIVERSITY OF TOKYO, NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Tetsuya SHOJI, Noritsugu SAKUMA, Akihito KINOSHITA, Tetsuya FUKUSHIMA, Hisazumi AKAI, Haruki OKUMURA, Masahiro SAKURAI, Takashi MIYAKE, Taro FUKAZAWA, Keiichi TAMAI
  • Publication number: 20250095916
    Abstract: Provided is an R-T-B-based rare earth magnet with an excellent magnetic property while ensuring a dimensional accuracy. The present disclosure relates to an R-T-B-based rare earth magnet in which R is a rare earth element, T is Fe and/or Co, and B is boron. The R-T-B-based rare earth magnet includes a magnet region layer and a surface layer covering a C-plane of the magnet region layer. The magnet region layer includes a main phase having an R2T14B-type crystal structure and a grain boundary phase present around the main phase. The main phase has an average grain size from 1.0 ?m to 10.0 ?m. The surface layer covers 85% or more of the C-plane of the magnet region layer with respect to a total area of the C-plane.
    Type: Application
    Filed: August 29, 2024
    Publication date: March 20, 2025
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SHOJI, Akihito KINOSHITA, Noritsugu SAKUMA
  • Publication number: 20240355516
    Abstract: A Sm—Fe—N-based magnetic material capable of enhancing saturation magnetization while suppressing a decrease in the anisotropic magnetic field as much as possible even when the use amount of Sm is reduced, and a production method thereof, are provided. The magnetic material of the present disclosure includes a main phase having a predetermined crystal structure. The composition of the main phase is represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh, where R1 is a given rare earth element, etc. M is a given element, and 0.25?x+y?0.73, 0.25?x?0.73, x/(x+y)?0.80, 0?z?0.10, 0.10?p+q?0.53, p+q?1.45(x+y)?0.5485, 0?s?0.10 and 2.9?h?3.3 are satisfied. The production method of the present disclosure includes nitriding a precursor including a crystal phase having a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17.
    Type: Application
    Filed: April 10, 2024
    Publication date: October 24, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SHOJI, Noritsugu SAKUMA, Akihito KINOSHITA
  • Patent number: 12080455
    Abstract: An Sm—Fe—N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is predetermined rare earth elements and the like, M is predetermined elements and the like, and 0.04?x+y?0.50, 0?z?0.10, 0?p+q?0.10, 0?s?0.10, and 2.9?h?3.1 are satisfied). A crystal volume of the main phase is 0.833 nm3 to 0.840 nm3. A manufacturing method of the Sm—Fe—N-based magnetic material according to the present disclosure includes nitriding a magnetic material precursor including a crystal phase having a composition represented by (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: September 3, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Ichigozaki, Tetsuya Shoji, Noritsugu Sakuma, Akihito Kinoshita, Masaaki Ito
  • Patent number: 12050617
    Abstract: An information processing device receives material data, relating to a material, that have been sent from a user terminal. The information processing device performs analysis in accordance with one or more analysis techniques with respect to the material data to thereby acquire analysis result data representing analysis results. The information processing device sends the analysis result data to the user terminal.
    Type: Grant
    Filed: May 10, 2021
    Date of Patent: July 30, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masao Yano, Tetsuya Shoji
  • Publication number: 20240248450
    Abstract: An information processing device that acquires a data set including a combination of state data representing a time series of states when a target object is worked combined with at least one of performance data representing a performance of the target object, data representing a structure or physical property of the target object, or process data representing a process setting value when the target object is worked. The information processing device generates a principal component value of each of a plurality of items of the state data in the acquired data set by executing principal component analysis on the plurality of items of state data. The information processing device outputs information representing a relationship between principal component values of the plurality of items of state data, and the at least one of the performance data, the data representing the structure or physical property, or the process data.
    Type: Application
    Filed: January 16, 2024
    Publication date: July 25, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tetsuya SHOJI, Masao YANO, Hanae SHIRATORI
  • Publication number: 20240186036
    Abstract: The R-T-B-based rare earth magnet 100 of the present disclosure includes a main phase 10 having an R2T14B-type crystal structure and a grain boundary phase 20. The average grain size of the main phase 10 is from 1.0 to 10,0 ?m. The main phase 10 has a core portion 12 and a shell portion 14. The total content ratio of cerium, lanthanum, yttrium and scandium is higher in the core portion 12 than in the shell portion 14. The total content ratio of neodymium, praseodymium, gadolinium, terbium, dysprosium and holmium is higher in the shell portion 14 than in the core portion 12. The R-T-B-based rare earth magnet 100 contains from 0.05 to 0.50 at % of carbon. The content ratio of the carbon is higher in the grain boundary phase 20 than in the main phase 10.
    Type: Application
    Filed: October 17, 2023
    Publication date: June 6, 2024
    Inventors: Noritsugu Sakuma, Tetsuya Shoji, Akihito Kinoshita
  • Patent number: 11994454
    Abstract: Automated analysis of particle beam measurement results is facilitated by a device that calculates a spatial parameter distribution representing spatial structure of a sample based on a scattering pattern corresponding to projection of the spatial structure of the sample to wavenumber space, the projection being obtained by detecting scattering of a particle beam which enters the sample and intersects with the sample.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: May 28, 2024
    Assignees: HITACHI, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akinori Asahara, Hidekazu Morita, Takuya Kanazawa, Kanta Ono, Masao Yano, Tetsuya Shoji
  • Patent number: 11996219
    Abstract: A magnetic material according to the present disclosure includes a main phase having an R2T14B type crystal structure (R is a rare earth element and T is a transition metal element). The main phase has a composition represented by ((Nd, Pr)(1-x-y)LaxR1y))2((Fe(1-z-w)(Co, Ni)zMw))14B (where, R1 is a rare earth element other than Nd, Pr, and La, M is an element other than Fe, Co, Ni, and a rare earth element, and the like, and 0.25?x?1.00, 0?y?0.10, 0.15?z?0.40, and 0?w?0.1 are satisfied). A manufacturing method of the magnetic material according to the present disclosure includes melting a raw material containing the elements constituting the main phase and solidifying the melted raw material.
    Type: Grant
    Filed: September 17, 2021
    Date of Patent: May 28, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Tetsuya Shoji, Akihito Kinoshita, Akira Kato
  • Publication number: 20240169616
    Abstract: An information processing device includes a non-transitory memory and a processor coupled to the non-transitory memory. The processor is configured to: set respective spectral data measured from each of plural materials as an instance of vector data; apply a dimension reduction technique to plural instances of vector data so as to generate two-dimensional map data in which each of the plural instances of vector data is projected two-dimensionally as each of plural plot points; identify unknown data indicating a plot point that is different from a plot point already present on the two-dimensional map data; convert the unknown data into converted spectral data; and output the converted spectral data.
    Type: Application
    Filed: October 6, 2023
    Publication date: May 23, 2024
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuya SHOJI, Masao Yano, Ryota Haru, Ryo Aoki
  • Publication number: 20240159690
    Abstract: An information processing device includes: an acquiring section acquiring small angle scattering data obtained by measuring a material, and supplemental information that is two-dimensional data of the material; and a predicting section that, by using the small angle scattering data and the supplemental information as input, predicts a three-dimensional structure of the material from output of a prediction model that is learned in advance and that is for predicting the three-dimensional structure of the material.
    Type: Application
    Filed: October 31, 2023
    Publication date: May 16, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hanae SHIRATORI, Masao YANO, Tetsuya SHOJI, Yasuhiro TOYAMA
  • Publication number: 20240160697
    Abstract: An information processing device, that acquires, from a plurality of user terminals, measurement data measured by a plurality of analytical method; quantifies the acquired measurement data using a predetermined statistical method; and displays, on a display of at least one user terminal of the plurality of user terminals, a necessary analytical method among the plurality of analytical method based on results of the quantification.
    Type: Application
    Filed: September 27, 2023
    Publication date: May 16, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato HOZUMI, Masao YANO, Tetsuya SHOJI
  • Publication number: 20240160767
    Abstract: An information processing device including a conversion section that converts plural data related to plural materials into vectors in a latent space, and a reception section that displays a graph plotted with the plural data according to the vectors in the latent space, that receives a specification of at least one of the data on the graph, and that also receives a change to a secrecy level or authorized disclosure parties of the data specified.
    Type: Application
    Filed: October 4, 2023
    Publication date: May 16, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masato HOZUMI, Masao YANO, Ryo AOKI, Tetsuya SHOJI
  • Publication number: 20240153680
    Abstract: Provided is a rare-earth anisotropic magnet powder capable of achieving high magnetic properties while reducing the usage of Nd and Pr. The present invention provides a rare-earth anisotropic magnet powder comprising magnetic particles that contain rare-earth elements, boron, and a transition metal element. The rare-earth elements include a first rare-earth element that comprises Ce and/or La and a second rare-earth element that comprises Nd and/or Pr. The rare-earth elements have a first ratio (R1/Rt) of 5% to 57%. The first ratio (R1/Rt) is a ratio of an amount (R1) of the first rare-earth element to a total amount (Rt) of the rare-earth elements in terms of the number of atoms. The first rare-earth element has a La ratio (La/R1) of 0% to 35%. The La ratio (La/R1) is a ratio of an amount of La to the amount (R1) of the first rare-earth element in terms of the number of atoms. The magnetic particles have a Ga content of 0.35 at % or less with respect to 100 at % as a whole.
    Type: Application
    Filed: March 3, 2022
    Publication date: May 9, 2024
    Applicants: AICHI STEEL CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryo SHIMBO, Masao YAMAZAKI, Noritsugu SAKUMA, Akihito KINOSHITA, Akira KATO, Tetsuya SHOJI
  • Patent number: 11935676
    Abstract: An Sm—Fe—N-based magnetic material according to the present disclosure includes a main phase having a predetermined crystal structure. The main phase has a composition represented by a molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh (where, R1 is a predetermined rare earth element, M is a predetermined element, and 0?x+y<0.04, 0?z?0.10, 0<p+q?0.10, 0?s?0.10, and 2.9?h?3.1 are satisfied). A lattice volume of the main phase is 0.830 nm3 to 0.840 nm3, and a density of the main phase is 7.70 g/cm3 to 8.00 g/cm3.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: March 19, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Daisuke Ichigozaki, Tetsuya Shoji, Noritsugu Sakuma, Akihito Kinoshita, Masaaki Ito
  • Patent number: 11928829
    Abstract: An information processing device acquires an image captured by a transmission electron microscope. The information processing device, for each partial region in the image, executes a two-dimensional Fourier transform on an image of the partial region. The information processing device, based on results obtained by executing the two-dimensional Fourier transform on each of the partial regions, performs clustering of frequency strengths obtained from the results of the two-dimensional Fourier transform. The information processing device determines regions of different crystallinity in the image, based on results of the clustering.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: March 12, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirotaka Sakamoto, Masao Yano, Tetsuya Shoji
  • Patent number: 11900655
    Abstract: An information processing device acquires an image captured by a transmission electron microscope. The information processing device, for each partial region in the image, calculates a variation in pixel values of pixels included in the partial region. The information processing device, for each partial region in the image, determines a degree of crystallinity of the partial region based on the calculated variation in the pixel values of the partial region.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: February 13, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirotaka Sakamoto, Masao Yano, Tetsuya Shoji
  • Patent number: 11869690
    Abstract: A rare earth magnet in which the amount used of a heavy rare earth element is more reduced while maintaining enhancement of the coercive force, and a producing method thereof are provided. The rare earth magnet of the present disclosure has a main phase 10 and a grain boundary phase 20. The main phase 10 has a composition represented by R12T14B. The main phase 10 has a core part 12 and a shell part 14. Denoting the abundances of R2 and Ce (R2 is heavy rare earth element) occupying 4f site of the shell part 14 as R24f and Ce4f, respectively, and denoting the abundances of R2 and Ce occupying 4g site of the shell part 14 as R24g and Ce4g, respectively, the rare earth magnet satisfies 0.44?R24g/(R24f+R24g)?0.70 and 0.04?(Ce4f+Ce4g)/(R24f+R24g). The rare earth magnet-producing method of the present disclosure uses a modifier containing at least R2 and Ce.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: January 9, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Tetsuya Shoji, Akihito Kinoshita, Akira Kato
  • Patent number: 11841907
    Abstract: The present disclosure provides an information processing system and an information processing method that, in a material analyzing service that is provided via a network, can appropriately manage data of a high degree of confidentiality. The system and method involve a user terminal that provides a data ID to a combination of first data that relates to a material, and second data that is data obtained by measuring the material and is data whose degree of confidentiality is lower than the first data. The user terminal stores the first data and data ID and transmits the second data and data ID to an information processing device. The information processing device carries out material analysis corresponding to the second data and transmits analysis results data to the user terminal. Accordingly, data having a high degree of confidentiality can be managed appropriately in a material analyzing service over a network.
    Type: Grant
    Filed: June 15, 2021
    Date of Patent: December 12, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masao Yano, Tetsuya Shoji
  • Patent number: 11664140
    Abstract: A rare earth magnet includes a main phase and a particle boundary phase and in which an overall composition is represented by a formula, (R2(1-x)R1x)yFe(100-y-w-z-v)CowBzM1v.(R3(1-p)M2p)q.(R4(1-s)M3s)t, where R1 is a light rare earth element, R2 and R3 are a medium rare earth element, R4 is a heavy rare earth element, M1, M2, M3 are a predetermined metal element. The main phase includes a core portion, a first shell portion, and a second shell portion. The content proportion of medium rare earth element is higher in the first shell portion than in the core portion, the content proportion of medium rare earth element is lower in the second shell portion than in the first shell portion. The second shell portion contains heavy rare earth elements.
    Type: Grant
    Filed: February 23, 2021
    Date of Patent: May 30, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Noritsugu Sakuma, Tetsuya Shoji, Akihito Kinoshita