Patents Examined by C. Melissa Koslow
  • Quantum dot material, and preparation method and use thereof
    Patent number: 11535796
    Abstract: Provided are a quantum dot material, a preparation method and use thereof. The quantum material includes a quantum dot, and a first cladding layer and a second cladding clad outside of the quantum dot, wherein the first cladding layer is located between the quantum dot and the second cladding layer. The quantum dot material provided herein has good water and oxygen barrier properties and good stability.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: December 27, 2022
    Assignee: SHENZHEN PLANCK INNOVATION TECHNOLOGY CO., LTD
    Inventors: Xiaowei Sun, Kai Wang, Fan Fang, Hongcheng Yang, Bing Xu, Yizun Liu, Xiang Li
  • Bipolar shell resurfaced perovskite quantum dots
    Patent number: 11535795
    Abstract: Methods are disclosed to restore the halide ions lost in the purification (ligand removal) of photoluminescent cesium lead halide or FA lead halide perovskite quantum dots. Quantum dots thus prepared can be used to deposit solid films with high packing density featuring dots with <0.4 nm gaps therebetween, low trap density 1/40 of previously reported, high mobility 100× previously reported, high photoluminescent quantum yield exceeding 90%, high external quantum yield exceeding 20%, and increased stability under electrical current. The quantum dots are used to formulate inks suitable for ink jet printing, drop casting, spin coating, and other solution-based methods for forming emissive layers used in light producing semiconductor devices.
    Type: Grant
    Filed: November 10, 2020
    Date of Patent: December 27, 2022
    Assignees: HUAWEI TECHNOLOGIES CANADA CO., LTD., THE GOVERNING COUNCIL OF THE UNIVERSITY OF TORONTO
    Inventors: Yitong Dong, Quan Lyu, Giovanni Francesco Cotella, Peter Chun, Ya-Kun Wang, Fanglong Yuan, Edward Sargent, Sjoerd Hoogland, Makhsud Saidaminov
  • Ferrite sintered magnet and rotary electrical machine comprising the same
    Patent number: 11532413
    Abstract: A ferrite sintered magnet 100 comprises M-type ferrite crystal grains 4 having a hexagonal structure, two-crystal grain boundaries 6a formed between two of the M-type ferrite crystal grains 4, and multiple-crystal grain boundaries 6b surrounded by three or more of the M-type ferrite crystal grains 4. This ferrite sintered magnet 100 contains at least Fe, Ca, B, and Si, and contains B in an amount of 0.005 to 0.9 mass % in terms of B2O3, the two-crystal grain boundaries 6a and the multiple-crystal grain boundaries 6b contain Si and Ca, and in a cross-section parallel to a c-axis of the ferrite sintered magnet, when the number of multiple-crystal grain boundaries 6b having a maximum length of 0.49 to 5 ?m per cross-sectional area of 76 ?m2 is N, N is 7 or less.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: December 20, 2022
    Assignee: TDK Corporation
    Inventors: Yoshitaka Murakawa, Shogo Muroya, Hiroyuki Morita, Masanori Ikeda
  • II-II-VI alloy quantum dot, preparation method therefor and application thereof
    Patent number: 11525084
    Abstract: The disclosure provides a II-II-VI alloy quantum dot, a preparation method and application thereof. The preparation method includes: step S1: reacting a precursor containing a second Group II element and a precursor containing a first Group VI element to form a II-VI semiconductor nanocluster; step S2: mixing the II-VI semiconductor nanocluster with a precursor containing a first Group II element, and performing cation exchange and in-situ growth to obtain a first system containing the II-II-VI alloy quantum dot.
    Type: Grant
    Filed: March 28, 2019
    Date of Patent: December 13, 2022
    Assignee: Najing Technology Corporation Limited
    Inventor: Jianhai Zhou
  • Phosphor and production method thereof phosphor-including member, and light emitting device or projector
    Patent number: 11525082
    Abstract: Provided is a particulate phosphor including a single crystal having a composition represented by a compositional formula (Y1-x-y-zLuxGdyCez)3+aAl5?aO12 (0?x?0.9994, 0?y?0.0669, 0.001?z?0.004, ?0.016?a?0.315) and a particle diameter (D50) of not less than 20 ?m. Also provided is a light-emitting device including a phosphor-including member that includes the phosphor and a sealing member including a transparent inorganic material sealing the phosphor or a binder including an inorganic material binding particles of the phosphor, and a light-emitting element that emits a blue light for exciting the phosphor.
    Type: Grant
    Filed: February 2, 2017
    Date of Patent: December 13, 2022
    Assignees: Tamura Corporation, National Institute for Materials Science
    Inventors: Daisuke Inomata, Yusuke Arai, Kiyoshi Shimamura, Encarnacion Antonia Garcia Villora
  • Ferrite sintered magnet and rotary electrical machine comprising the same
    Patent number: 11521769
    Abstract: A ferrite sintered magnet 100 comprises M-type ferrite crystal grains 4 having a hexagonal crystal structure, two-crystal grain boundaries 6a formed between two of the M-type ferrite crystal grains 4, and multiple-crystal grain boundaries 6b surrounded by three or more of the M-type ferrite crystal grains 4. This ferrite sintered magnet 100 contains at least Fe, Ca, B, and Si, and contains B in an amount of 0.005 to 0.9 mass % in terms of B2O3, the two-crystal grain boundaries 6a and the multiple-crystal grain boundaries 6b contain Si and Ca, and in a cross-section parallel to a c-axis of the ferrite sintered magnet, when the number of multiple-crystal grain boundaries having a maximum length of 0.088 or more and less than 0.49 ?m per cross-sectional area of 76 ?m2 is P, P is 8 or more.
    Type: Grant
    Filed: March 20, 2020
    Date of Patent: December 6, 2022
    Assignee: TDK Corporation
    Inventors: Yoshitaka Murakawa, Shogo Muroya, Hiroyuki Morita, Masanori Ikeda
  • Highly tunable fluorescent core-shell particles for environmental release simulation and tracking applications
    Patent number: 11518691
    Abstract: A particle for emulating pollutant tracking in water has a florescent core. A semitransparent shell is formed around the florescent core.
    Type: Grant
    Filed: December 11, 2020
    Date of Patent: December 6, 2022
    Assignee: U.S. Environmental Protection Agency
    Inventor: Anthony Todd Zimmer
  • Mineral wool product prepared with a binder containing a hydrophobic agent
    Patent number: 11519547
    Abstract: A mineral wool product comprises mineral fibers bound by a binder resulting from the curing of a binder composition comprising a phenol-formaldehyde-based resin, and/or a carbohydrate containing component; a hydrophobic agent comprising (i) at least one silicone compound, such as silicone resin; (ii) at least one hardener, such as silane; (iii) optionally, at least one emulsifier; as insulation of a metallic structure, said structure having an operating temperature between 0-650° C.
    Type: Grant
    Filed: December 3, 2020
    Date of Patent: December 6, 2022
    Assignee: ROCKWOOL INTERNATIONAL A/S
    Inventor: Claudia Zwaag
  • Method of producing a magnetic powder and method of producing a magnetic recording medium
    Patent number: 11521649
    Abstract: A method of producing a magnetic powder includes: performing heat treatment on first particles that contain triiron tetraoxide to prepare second particles that contain ?-iron oxide.
    Type: Grant
    Filed: September 27, 2017
    Date of Patent: December 6, 2022
    Assignee: Sony Corporation
    Inventors: Atsushi Muramatsu, Masafumi Nakaya, Masaru Terakawa, Satoru Abe, Natsuki Toyosawa, Katsunori Maeshima
  • Method of producing beta-sialon fluorescent material
    Patent number: 11512248
    Abstract: Provided a method of producing a ?-sialon fluorescent material having excellent emission intensity. The method includes providing a first composition containing aluminum, an oxygen atom, and a europium-containing silicon nitride, heat treating the first composition, contacting the heat-treated composition and a basic substance to obtain a second composition, and contacting the second composition resulting from contacting the heat-treated composition with the basic substance and an acidic liquid medium containing an acidic substance.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: November 29, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Kenichi Aoyagi, Takashi Kaide, Yuya Takahashi, Shoji Hosokawa
  • Perovskite film, method for producing the same, light-emitting device and solar cell
    Patent number: 11515491
    Abstract: Stable perovskite films having substantially-no phase transition within a predetermined temperature range are disclosed. In the films, formation of carrier traps is suppressed. Thermally stable perovskite solar cells and light-emitting devices using the films are also disclosed.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: November 29, 2022
    Assignee: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION
    Inventors: Chuanjiang Qin, Toshinori Matsushima, Chihaya Adachi
  • Perovskite polymer composite
    Patent number: 11512213
    Abstract: Disclosed herein is a polymeric film, the film comprising a polymeric matrix material, a plurality of perovskite nanocrystals and/or aggregates of perovskite nanocrystals dispersed throughout the polymeric matrix material. There is also disclosed a perovskite polymer resin composition, a perovskite-polymer resin composition, a perovskite ink and a method of forming a luminescent film using any one of the compositions or ink. Preferably, the perovskite material is a lead halide perovskite containing a cation selected from Cs, an alkylammonium ion, or a formamidinium ion. The polymeric matrix is preferably formed from monomers comprising a vinyl or an acrylate group.
    Type: Grant
    Filed: March 13, 2019
    Date of Patent: November 29, 2022
    Assignee: NATIONAL UNIVERSITY OF SINGAPORE
    Inventors: Zhi Kuang Tan, Ying-Chieh Wong, Jun De Andrew Ng, Beiye Li
  • Process for preparing rodlike magnetiic ferroferric oxide material and use thereof
    Patent number: 11512007
    Abstract: The present invention relates to a process for preparing a rodlike magnetic ferroferric oxide (Fe3O4) material and use thereof. The preparation includes the following steps: step 1: magnetic Fe3O4 nanoparticle preparation; and step 2: self-assembly of magnetic Fe3O4@SiO2 nanoparticles into a rodlike magnetic material. When in use, the rodlike magnetic Fe3O4 material prepared by the process according to claim 1 is used in micro- and nano-motors, which can implement rotation and deflection in an external magnetic field. The present invention provides a process for preparing a rodlike magnetic Fe3O4 material. The rodlike magnetic ferroferric oxide material prepared by the process is suitable for mass production on an industrial scale, featuring identifiable direction of the magnetic moment, strong magnetism, good magnetic response, simple process, and low cost.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: November 29, 2022
    Assignee: Harbin Institute Of Technology
    Inventors: Huanhuan Feng, Yuhuan Liu, Xing Ma, Tingting Zheng, Weiwei Zhao, Jiaheng Zhang
  • Luminescent microspheres and preparation method thereof
    Patent number: 11516896
    Abstract: Luminescent microspheres and a preparation method thereof are disclosed. The preparation method includes: 1) preparing cadmium oxide-doped silica microspheres; 2) adding the silica microspheres to a mixed solution of octadecene/oleic acid or trioctylamine (TOA)/oleic acid, and heating a resulting mixture to a boiling point so that the microspheres swell at high temperature and the oleic acid penetrates into the microspheres to react with CdO to obtain an organic cadmium-adsorbed silica suspension; and 3) adding a selenium precursor to the obtained organic cadmium-adsorbed silica suspension to obtain the luminescent microspheres, where, the selenium precursor reacts with the adsorbed organic cadmium to form CdSe.
    Type: Grant
    Filed: February 26, 2021
    Date of Patent: November 29, 2022
    Assignee: TIANJIN NAMEI NAMI TECHNOLOGY CO., LTD.
    Inventors: Guang Liu, Baojie Zhao, Haipeng Liu, Yi Wang
  • Long-persistent luminescent composition, long-persistent luminescent device and wavelength control method
    Patent number: 11505739
    Abstract: An organic long-persistent luminescent composition containing a first organic compound, a second organic compound and a third organic compound and satisfying the following expression (1) is a long-persistent luminescent material that facilitates emission color control. ES1(A) represents a lowest excited singlet energy level of emission from the first organic compound and the second organic compound, ES1(B) represents a lowest excited singlet energy level of the third organic compound. ES1(B)?ES1(A)?0.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: November 22, 2022
    Assignee: OKINAWA INSTITUTE OF SCIENCE AND TECHNOLOGY SCHOOL CORPORATION
    Inventors: Ryota Kabe, Kazuya Jinnai, Chihaya Adachi
  • Textured planar m-type hexagonal ferrites and methods of use thereof
    Patent number: 11508503
    Abstract: A grain-oriented M-type hexagonal ferrite has the formula MeFe12O19, and a dopant effective to provide planar magnetic anisotropy and magnetization in a c-plane, or a cone anisotropy, in the hexagonal crystallographic structure wherein Me is Sr+, Ba2+ or Pb2+, and wherein greater than 30%, preferably greater than 80%, of c-axes of the ferrite grains are aligned perpendicular to the c-plane.
    Type: Grant
    Filed: April 9, 2019
    Date of Patent: November 22, 2022
    Assignee: ROGERS CORPORATION
    Inventors: Yajie Chen, Kevin Ring, Li Zhang, Michael S. White
  • Starch and carboxylic acid binder compositions and articles made therewith
    Patent number: 11505724
    Abstract: Fiber-containing composites are described that include woven or non-woven fibers, and a binder that holds the fibers together. The binder may include the reaction product of a starch and a polycarboxylic acid. The starch has a weight average molecular weight that ranges from 1×106 Daltons to 1×107 Daltons. The fiber-containing composite has an unaged tensile strength of greater than 4.0 and an aged tensile strength greater than 3.0. Also described are methods of making the fiber-containing composites. The methods may include applying a binder composition to fibers to form coated fibers, measuring a moisture content of the coated fibers, and curing the coated fibers in a curing oven to form the fiber-containing composite. The binder composition may include a starch having a weight average molecular weight that ranges from 1×106 Daltons to 1×107 Daltons, and a polycarboxylic acid.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: November 22, 2022
    Assignee: Johns Manville
    Inventors: Kiarash Alavi, Uranchimeg Lester, Ameya Natu, James Cottier, Jawed Asrar, Philip Francis Miele
  • Semiconductor nanoparticles and core/shell semiconductor nanoparticles
    Patent number: 11499096
    Abstract: An object of the present invention is to provide semiconductor nanoparticles having high quantum efficiency (QY) and a narrow full width at half maximum (FWHM). Semiconductor nanoparticles according to an embodiment of the present invention are semiconductor nanoparticles including at least, In, P, Zn and S, wherein the semiconductor nanoparticles include the components other than In in the following ranges: 0.50 to 0.95 for P, 0.30 to 1.00 for Zn, 0.10 to 0.50 for S, and 0 to 0.30 for halogen, in terms of molar ratio with respect to In.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 15, 2022
    Assignee: SHOEI CHEMICAL INC.
    Inventors: Takafumi Moriyama, Ryosuke Motoyoshi
  • Quantum dots and device including the same
    Patent number: 11499098
    Abstract: A quantum dot including a core comprising a first semiconductor nanocrystal including a zinc chalcogenide and a semiconductor nanocrystal shell disposed on the surface of the core and comprising zinc, selenium, and sulfur. The quantum dot does not comprise cadmium, emits blue light, and may exhibit a digital diffraction pattern obtained by a Fast Fourier Transform of a transmission electron microscopic image including a (100) facet of a zinc blende structure. In an X-ray diffraction spectrum of the quantum dot, a ratio of a defect peak area with respect to a peak area of a zinc blende crystal structure is less than about 0.8:1. A method of producing the quantum dot, and an electroluminescent device including the quantum dot are also disclosed.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: November 15, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sung Woo Kim, Jin A Kim, Tae Hyung Kim, Kun Su Park, Yuho Won, Jeong Hee Lee, Eun Joo Jang, Hyo Sook Jang, Yong Seok Han, Heejae Chung
  • Liquid capsule having thermochromic and photochromic properties
    Patent number: 11499060
    Abstract: The invention relates to a capsule comprising a shell containing a transparent and thermally conducting liquid, particles having a thermochromic coating and particles having a photochromic coating, the thermochromic particles being bulkier than photochromic particles, the liquid being such that, within a first range of temperatures, its density is greater than the density of the thermochromic particles and than the density of the photochromic particles, and such that, within a second range of temperatures greater than those of the first range, the density of the photochromic particles is less than the density of the liquid, which is itself less than the density of the thermochromic particles.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: November 15, 2022
    Assignee: The Swatch Group Research and Development Ltd
    Inventor: Nicolas Francois