Patents by Inventor Hiroaki Kumazawa

Hiroaki Kumazawa 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: 11965123
    Abstract: A red phosphor that has optical characteristics and durability under high-temperature and high-humidity environments, and a method for producing the same. The red phosphor includes a Mn-activated complex fluoride represented by the following general formula (1) and bismuth: A2MF6:Mn4+??(1) wherein A represents at least one alkali metal element selected from the group consisting of lithium, sodium, potassium, rubidium and cesium, and M represents at least one tetravalent element selected from the group consisting of silicon, germanium, tin, titanium, zirconium and hafnium.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: April 23, 2024
    Assignee: STELLA CHEMIFA CORPORATION
    Inventors: Hiroaki Takatori, Shinya Kumazawa, Tetsuya Arakawa, Tetsuo Nishida
  • Patent number: 6413995
    Abstract: The invention relates to cinnamamide derivatives having the following formula wherein R1 represents a hydroxyl group, a C1-6-alkoxy group, an arylalkoxy group or a substituted or unsubstituted amino group; R2 and R3 are same or different, each of which represents a hydrogen atom, a halogen atom or a C1-4-alkyl group; R4 represents a hydrogen atom or a C1-6-alkyl group; R5 represents a hydrogen atom, a C1-6-alkyl group or an aryl group; R6 represents a hydrogen atom, a C1-6-alkyl group, a cyano group or a C1-6-alkoxy-carbonyl group; W represents an oxygen atom, a sulfur atom, an imino group, a methylene group, a hydroxymethylene group or a carbonyl group; X and Y are same or different, each of which represents an oxygen atom or a sulfur atom; m represents an integer of 0 to 2; n represents an integer of 1 to 3; and when m is 0, a group: —C(R2)(R3)—W— may represent a vinylene group; or a pharmaceutically acceptable salt thereof; and a pharmaceutical composition con
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: July 2, 2002
    Assignee: Tsumura & Co.
    Inventors: Yoshihiro Hasegawa, Shouichirou Shindou, Tomohisa Hattori, Tatsuhiro Obata, Fumiko Horiuchi, Hiroyuki Hayakawa, Hiroaki Kumazawa
  • Patent number: 6313153
    Abstract: The present invention relates to an agent for treating nephritis and a TGF-&bgr; inhibiting agent comprising as an effective ingredient a pyridylacrylamide derivative represented by the following formula (I): wherein Ar1 is a substituted or unsubstituted pyridyl group, Ar2 is a substituted or unsubstituted phenyl group, R1 is a hydrogen atom, an alkyl group or an aryl group, R2 is a hydrogen atom, an alkyl group, a cyano group or an alkoxycarbonyl group, R3 is a hydrogen atom or an optionally substituted alkyl group, X is an oxygen or sulfur atom, A and B are same or different and each represent a hydrogen atom, a hydroxyl group, an alkoxy group or an alkylthio group, or A and B together form an oxo or thioxo group, or a group represented by the formula: ═N—Y in which Y is a dialkylamino, hydroxyl, aralkyloxy or alkoxy group, or a group represented by the formula: —Z1—M—Z2— which Z1 and Z2 are same or different and each represent an oxygen or sulfur atom or
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: November 6, 2001
    Assignee: Tsumura & Co.
    Inventors: Yoshihiro Hasegawa, Shouichirou Shindou, Tomohisa Hattori, Yousuke Yamazaki, Tatsuhiro Obata, Fumiko Horiuchi, Hiroyuki Hayakawa, Hiroaki Kumazawa
  • Patent number: D912922
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: March 9, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D913621
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: March 16, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D913622
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: March 16, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D913623
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: March 16, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D923282
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: June 22, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D923283
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: June 22, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D923909
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: June 29, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa
  • Patent number: D930938
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: September 14, 2021
    Assignee: MITSUBISHI LOGISNEXT CO., LTD.
    Inventors: Masahiro Yoshioka, Hiroaki Kumazawa