Patents by Inventor Hirotsugu Takizawa

Hirotsugu Takizawa 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).

  • LIQUID DISPERSION OF METAL NANOPARTICLES FOR SOLDER PASTE, METHOD FOR PRODUCING THE LIQUID DISPERSION, SOLDER PASTE, METHOD FOR PRODUCING THE SOLDER PASTE
    Publication number: 20180056448
    Abstract: A liquid dispersion of metal nanoparticles for solder paste comprises metal nanoparticles made of an alloy and a reducing dispersion medium, wherein the metal nanoparticles have an average particle diameter of 1.0 to 200 nm, the metal nanoparticles have a sintering initiation temperature of less than 50° C., and the liquid dispersion comprises substantially no surfactant or surface modifier.
    Type: Application
    Filed: March 24, 2016
    Publication date: March 1, 2018
    Applicants: TOHOKU UNIVERSITY, PANASONIC CORPORATION
    Inventors: Yamato HAYASHI, Hirotsugu TAKIZAWA, Akio FURUSAWA
  • Producing method of metal fine particles or metal oxide fine particles, metal fine particles or metal oxide fine particles, and metal-containing paste, and metal film or metal oxide film
    Patent number: 9309119
    Abstract: There is provided a producing method of metal fine particles or metal oxide fine particles for producing metal fine particles or metal oxide fine particles by atomizing raw materials by performing processes including an oxidizing process and a reducing process to the raw materials composed of metal or a metal compound.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: April 12, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Yamato Hayashi, Yoshihiro Sekiguchi, Hirotsugu Takizawa, Dai Ishikawa, Tomiya Abe
  • SOLID ELECTROLYTE AND ALL-SOLID STATE ION SECONDARY BATTERY USING THE SAME
    Publication number: 20150380765
    Abstract: To provide both resistance to reduction and high ion conductivity, a solid electrolyte includes a crystal having a structure expressed as A4-2x-y-zBxSn3-yMyO8-zNz (1?4?2x?y?z<4, A: Li, Na, B: Mg, Ca, Sr, Ba, M: V, Nb, Ta, N: F, Cl) or has a crystal having a structure expressed as A2-1.5x-0.5y-0.5zBxSn3-yMyO8-zNz (0.5?2?1.5x?0.5y?0.5z<2, A: Mg, Ca, B: Sc, Y, Sb, Si, M: V, Nb, Ta, N: F, Cl).
    Type: Application
    Filed: March 15, 2013
    Publication date: December 31, 2015
    Applicant: HITACHI, LTD.
    Inventors: Tadashi FUJIEDA, Jun KAWAJI, Takuya AOYAGI, Yusuke ASARI, Takashi NAITO, Hirotsugu TAKIZAWA, Yamato HAYAHI, Yuya NAKATANI
  • PRODUCING METHOD OF METAL FINE PARTICLES OR METAL OXIDE FINE PARTICLES, METAL FINE PARTICLES OR METAL OXIDE FINE PARTICLES, AND METAL-CONTAINING PASTE, AND METAL FILM OR METAL OXIDE FILM
    Publication number: 20110233480
    Abstract: There is provided a producing method of metal fine particles or metal oxide fine particles for producing metal fine particles or metal oxide fine particles by atomizing raw materials by performing processes including an oxidizing process and a reducing process to the raw materials composed of metal or a metal compound.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicants: HITACHI CABLE, LTD., TOHOKU UNIVERSITY
    Inventors: Yamato HAYASHI, Yoshihiro SEKIGUCHI, Hirotsugu TAKIZAWA, Dai ISHIKAWA, Tomiya ABE
  • Superconductive copper-containing oxide materials of the formula A.sub.p B.sub.q Cu.sub.2 O.sub.4.+-.r
    Patent number: 5446017
    Abstract: A superconductive oxide material having an infinite layer structure and having the following formula:A.sub.p B.sub.q Cu.sub.2 O.sub.4.+-.rwherein A and B are different and each represent an element selected from lanthanoid elements and elements belonging to Groups IA, IIA and IIIA of the Periodic Table, p is between 0.9 and 1.1, q is between 0.9 and 1.1 and r is between 0 and 0.6. The oxide material has a crystal structure belonging to a tetragonal system of P4/mmm and 1-123 having the following lattice parameters:3.8.ANG..ltoreq.a.ltoreq.4.0.ANG.7.6.ANG..ltoreq.c.ltoreq.8.0.ANG.or to an orthorhombic system of Pmmm and I-47 having the following lattice parmeters:3.8.ANG..ltoreq.a.ltoreq.3.95.ANG.3.82.ANG..ltoreq.b.ltoreq.4.0.ANG.7.6.ANG..ltoreq.c.ltoreq.8.0.ANG..
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: August 29, 1995
    Assignees: Central Research Institute of Electric Power Industry, Tohoku Electric Power Co., Inc., International Superconductivity Technology Center
    Inventors: Takeshi Sakurai, Nobuyuki Sugii, Seiji Adachi, Michiharu Ichikawa, Yuji Yaegashi, Hisao Yamauchi, Masahiko Shimada, Hirotsugu Takizawa