Patents by Inventor Yoshinao Shirasaki

Yoshinao Shirasaki 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: 20240334814
    Abstract: A mixed powder comprising a first compound and a second compound, wherein the first compound has the fused ring structure having the most rings and having three or more rings, in fused ring structures included therein, and the second compound has the fused ring structure having the most rings and having 5 or more rings, in fused ring structures included therein, and the fused ring structure having the most rings thereof has more rings than that of the first compound.
    Type: Application
    Filed: June 17, 2022
    Publication date: October 3, 2024
    Applicant: IDEMITSU KOSAN Co.,LTD.
    Inventors: Tetsuya MASUDA, Hiroyuki IWABUCHI, Masato NAKAMURA, Yoshinao SHIRASAKI, Satomi TASAKI, Hiroaki TOYOSHIMA
  • Publication number: 20240300978
    Abstract: A compound represented by the following formula (A1) (X1 is O or S; two or more of Y1, Y2, and Y3 are N; and Ar1 is an aryl group including 6 to 50 ring carbon atoms, comprising a benzene ring having at least substituent Ar2 at the ortho-position; Ar2 is an aryl group; and Ar3 is a predetermined group).
    Type: Application
    Filed: July 28, 2023
    Publication date: September 12, 2024
    Applicant: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshinao SHIRASAKI, Masatoshi SAITO, Kei YOSHIDA, Tetsuya MASUDA, Masato NAKAMURA, Tomokatsu KUSHIDA
  • Publication number: 20240206325
    Abstract: A compound represented by the following formula (1), wherein in the formula (1), A is a substituted or unsubstituted aromatic hydrocarbon ring group containing a nitrogen atom as a part of a substituent and having a fused ring composed of 5 or more rings, or a substituted or unsubstituted heterocyclic group containing a nitrogen atom as a part of the skeleton or a substituent and having a fused ring composed of 5 or more rings; B is a monovalent group represented by the following formula (b1); wherein in the formula (b1), *B is bonded with the nitrogen atom contained as a part of the skeleton of A or a substituent via a single bond.
    Type: Application
    Filed: March 10, 2022
    Publication date: June 20, 2024
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshinao SHIRASAKI, Kazuma MASE, Hiroaki ITOI
  • Publication number: 20240090329
    Abstract: A compound includes: at least one group represented by a formula (11) below; and a single benz[de]anthracene derivative skeleton represented by a formula (1000) below in a molecule, in which Ar1 is a substituted or unsubstituted aryl group including at least four rings, at least one of R10 to R19 is a group represented by the formula (11), L1 is a substituted or unsubstituted arylene group having 6 to 15 ring carbon atoms or a substituted or unsubstituted divalent heterocyclic group having 5 to 15 ring atoms, and mx is 1, 2, or 3.
    Type: Application
    Filed: October 1, 2021
    Publication date: March 14, 2024
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Hiroaki ITOI, Yuki NAKANO, Taro YAMAKI, Maiko IIDA, Takamoto MORITA, Shintaro BAN, Ryota TAKAHASHI, Yu KUDO, Yoshinao SHIRASAKI
  • Publication number: 20240074311
    Abstract: A compound is represented by a formula (1) below. In the formula (1): R1 to R9, R101 to R108, and R111 to R118 are each independently a hydrogen atom, a substituted or unsubstituted aryl group having 6 to 20 ring carbon atoms, or the like; Ar12 is a substituted or unsubstituted aryl group having 10 to 30 ring carbon atoms or the like; p is 0 or 1; q is 0 or 1; and p+q is 1 or 2.
    Type: Application
    Filed: June 13, 2023
    Publication date: February 29, 2024
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Shintaro BAN, Yu KUDO, Kei YOSHIDA, Sigma HASHIMOTO, Yoshinao SHIRASAKI
  • Patent number: 11765972
    Abstract: A compound represented by the following formula (1), wherein X1 is O or S, and two or more of Y1, Y2 and Y3 are N, provided that the case where one or both of —Ar1-Ar2 and —Ar3-Ar4 is a p-terphenyl-3-yl group is excluded.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: September 19, 2023
    Assignee: IDEMITSU KOSAN CO., LTD.
    Inventors: Yoshinao Shirasaki, Tetsuya Masuda, Takushi Shiomi, Masatoshi Saito, Kei Yoshida, Masato Nakamura
  • Publication number: 20230145611
    Abstract: A compound represented by the following formula (1), wherein at least one of Ra to Rd is a substituted or unsubstituted biphenyl-2-yl group; and at least one of Ra to Rd has a specific substituent.
    Type: Application
    Filed: February 19, 2021
    Publication date: May 11, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yuki NAKANO, Ryota TAKAHASHI, Yoshinao SHIRASAKI, Yu KUDO
  • Publication number: 20230047894
    Abstract: A compound represented by the following formula (A1) (X1 is O or S; two or more of Y1, Y2, and Y3 are N; and Ar1 is an aryl group including 6 to 50 ring carbon atoms, comprising a benzene ring having at least substituent Ar2 at the ortho-position; Ar2 is an aryl group; and Ar3 is a predetermined group).
    Type: Application
    Filed: December 6, 2019
    Publication date: February 16, 2023
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshinao SHIRASAKI, Masatoshi SAITO, Kei YOSHIDA, Tetsuya MASUDA, Masato NAKAMURA, Tomokatsu KUSHIDA
  • Publication number: 20220359831
    Abstract: To provide a compound that further improves the capability of an organic EL device, an organic EL device having a further improved device capability, and an electronic device including the organic EL device. A compound represented by the following formula (1) (wherein *p, *q, *r, *s, *b, *a, R1, R2, R11 to R18, L, and R31 to R35 are defined in the description), an organic electroluminescent device containing the compound, and an electronic device including the organic electroluminescent device.
    Type: Application
    Filed: August 19, 2020
    Publication date: November 10, 2022
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Tomokatsu KUSHIDA, Kei YOSHIDA, Masatoshi SAITO, Yoshinao SHIRASAKI, Masato NAKAMURA, Michelle GROARKE, Heinz WOLLEB, Natalia CHEBOTAREVA
  • Publication number: 20210130336
    Abstract: An organic electroluminescent element having a further improved life; and a compound which is a novel material capable of providing the organic electroluminescent element and is represented by formula (1).
    Type: Application
    Filed: April 12, 2019
    Publication date: May 6, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshinao SHIRASAKI, Tetsuya MASUDA
  • Publication number: 20210009527
    Abstract: A compound represented by the following formula (1), wherein X1 is O or S, and two or more of Y1, Y2 and Y3 are N, provided that the case where one or both of —Ar1—Ar2 and —Ar3—Ar4 is a p-terphenyl-3-yl group is excluded.
    Type: Application
    Filed: February 20, 2019
    Publication date: January 14, 2021
    Applicant: IDEMITSU KOSAN CO.,LTD.
    Inventors: Yoshinao SHIRASAKI, Tetsuya MASUDA, Takushi SHIOMI, Masatoshi SAITO, Kei YOSHIDA, Masato NAKAMURA
  • Patent number: 10435564
    Abstract: Provided is a compound capable of exhibiting different changes in hue with one kind of molecule. The compound has julolidine structures, and is represented by a general formula (1): wherein each of Q and Q1 represents C(R) or N; R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two Rs may bind to each other to form a ring; R1 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two R1s may bind to each other to form a ring; n represents a number of 0 to 3; and m represents a number of 0 to 3.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: October 8, 2019
    Assignee: RIKEN
    Inventors: Atsuya Muranaka, Yoshinao Shirasaki, Masanobu Uchiyama, Shinichiro Kamino
  • Publication number: 20180244923
    Abstract: Provided is a compound capable of exhibiting different changes in hue with one kind of molecule. The compound has julolidine structures, and is represented by a general formula (1): wherein each of Q and Q1 represents C(R) or N; R represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two Rs may bind to each other to form a ring; R1 represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, or a carboxyl group, where two R1s may bind to each other to form a ring; n represents a number of 0 to 3; and m represents a number of 0 to 3.
    Type: Application
    Filed: September 2, 2016
    Publication date: August 30, 2018
    Inventors: Atsuya Muranaka, Yoshinao Shirasaki, Masanobu Uchiyama, Shinichiro Kamino