Patents by Inventor Tetsuo AKASAKA

Tetsuo AKASAKA 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: 20230357538
    Abstract: An objective of the present invention is to provide a resin composition capable of improving at least either one of heat resistance and visible light transmission. A resin composition according to an aspect of the present invention contains a coloring agent and a resin, and the coloring agent contains a compound represented by a formula (I), a formula (II), a formula (III) or a formula (IV).
    Type: Application
    Filed: September 10, 2021
    Publication date: November 9, 2023
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Tetsuo AKASAKA, Ayaka MATSUYAMA, Takuma AOKI, Yutaka KAWANISHI
  • Publication number: 20230348502
    Abstract: The present invention provides a novel compound represented by formula (I) or formula (II) capable of reducing the color difference before and after post-baking. [In the formula (I), Y1 and Z1 each independently represent an oxygen atom or a sulfur atom, and Z2 and Z3 each independently represent a single bond, an oxygen atom, or a sulfur atom, provided that at least one of Y1, Z1, Z2, and Z3 represents a sulfur atom, and in the formula (II), Y2 and Z4 each independently represent an oxygen atom or a sulfur atom, and Z5 represents a single bond, an oxygen atom, or a sulfur atom, provided that at least one of Y2, Z4, and Z5 represents a sulfur atom.
    Type: Application
    Filed: August 18, 2021
    Publication date: November 2, 2023
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takuma AOKI, Tomohiro NAKAYAMA, Tetsuo AKASAKA, Takahiro KUROGI
  • Publication number: 20230312869
    Abstract: The object of the present invention is to provide a colored resin composition containing an aluminum phthalocyanine pigment capable of forming a colored coating film with no foreign matter (preferably a colored coating film with no foreign matter and good adhesion). The colored resin composition of the present invention contains a colorant, a compound represented by formula (DA), a resin, and a solvent, wherein the colorant contains an aluminum phthalocyanine pigment. [In formula (DA), Rd1 represents a hydrocarbon group having 1 to 12 carbon atoms and optionally having a substituent. When the hydrocarbon group has 2 to 12 carbon atoms and the hydrocarbon group has —CH2—, —CH2— may be substituted with —O—, —S—, or —CO—. Rd2 and Rd3 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 12 carbon atoms and optionally having a substituent, or Rd2 and Rd3 are combined to form a ring together with —CO—NRd1—CO—.
    Type: Application
    Filed: August 27, 2021
    Publication date: October 5, 2023
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takahiro KUROGI, Takuma AOKI, Tomohiro NAKAYAMA, Tetsuo AKASAKA, Manabu TOGAI
  • Publication number: 20230279034
    Abstract: The present invention provides a compound represented by formula (I) or formula (II) capable of reducing the color difference before and after post-baking. [In the formula (I), R1 represents a C2-C20 unsaturated hydrocarbon group optionally having a substituent; R2 represents a hydrogen atom, a C1-C20 hydrocarbon group optionally having a substituent, or a single bond connecting Z2 and R1; and Z1 and Z2 each independently represent a single bond or an oxygen atom, and in the formula (II), R3 represents a C2-C20 unsaturated hydrocarbon group optionally having a substituent; and Z3 represents a single bond or an oxygen atom].
    Type: Application
    Filed: July 21, 2021
    Publication date: September 7, 2023
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Takuma AOKI, Tomohiro NAKAYAMA, Tetsuo AKASAKA, Takahiro KUROGI, Hirofumi HAMAKI
  • Publication number: 20230130507
    Abstract: It is an object of the present invention to provide a negative resist composition that is useful for producing a color filter with a high transmittance of light at a wavelength of 440 nm. A negative resist composition of the present invention comprises a colorant and a resin, wherein the colorant contains a xanthene dye, and a cured film formed from the negative resist composition exhibits a spectrum that satisfies the following condition 1: [condition 1] a maximum absorption wavelength is present in a wavelength range of 500 to 580 nm, and based on a transmittance at the maximum absorption wavelength being 5%, a transmittance at a wavelength of 440 nm is 80% or more and a transmittance at a wavelength of 620 nm is 80% or more.
    Type: Application
    Filed: March 11, 2021
    Publication date: April 27, 2023
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Tomohiro NAKAYAMA, Tetsuo AKASAKA, Takuma AOKI, Taku MIYAZAWA
  • Patent number: 11584852
    Abstract: An object of the present invention is to provide a novel squarylium dye that can achieve an equivalent chromaticity value of even a colored resin composition having a low content of the squarylium dye as compared with a colored resin composition comprising a conventional squarylium dye. The present invention provides a compound represented by the formula (I) wherein R4 to R4 each independently represent a hydrogen atom or the like; R5 to R8 each independently represent a hydrogen atom or the like; R9 and R10 each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms or the like; R11 and R12 each independently represent a halogen atom or an alkyl halide group having 1 to 6 carbon atoms; and m1 and m2 each independently represent an integer of 1 to 5.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: February 21, 2023
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Keisuke Inoue, Yutaka Kawanishi, Tetsuo Akasaka
  • Publication number: 20220334477
    Abstract: An object of the present invention is to provide a colored curable resin composition for forming an optical filter in which the occurrence of foreign matter is reduced. The present invention relates to a colored curable resin composition containing a colorant, a resin, a polymerizable compound, and a polymerization initiator, wherein the colorant is a colorant containing a compound represented by formula (I) or formula (II).
    Type: Application
    Filed: September 30, 2020
    Publication date: October 20, 2022
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Tetsuo AKASAKA, Katsuharu INOUE, Takuma AOKI, Yutaka KAWANISHI
  • Publication number: 20220289944
    Abstract: A colored resin composition containing a colorant, a resin, and a solvent, wherein a transmittance when a film having a film thickness of 1 ?m is formed satisfies the following conditions: (1) a maximum value of the transmittance in a wavelength range of 400 to 800 nm is 30% or less; and (2) a minimum value of the transmittance in a wavelength range of 1,050 to 1,300 nm is 90% or more, and a colored resin composition containing a colorant, a resin, and a solvent, wherein a transmittance when a film having a film thickness of 1 ?m is formed satisfies the following conditions: (1) a maximum value of the transmittance in a wavelength range of 400 to 800 nm is 30% or less; and (2) a minimum value of the transmittance in a wavelength range of 1,050 to 1,300 nm is 90% or more.
    Type: Application
    Filed: September 30, 2020
    Publication date: September 15, 2022
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Katsuharu INOUE, Tetsuo AKASAKA, Takuma AOKI
  • Publication number: 20210002487
    Abstract: An object of the present invention is to provide a novel squarylium dye that can achieve an equivalent chromaticity value of even a colored resin composition having a low content of the squarylium dye as compared with a colored resin composition comprising a conventional squarylium dye. The present invention provides a compound represented by the formula (I) wherein R4 to R4 each independently represent a hydrogen atom or the like; R5 to R8 each independently represent a hydrogen atom or the like; R9 and R10 each independently represent a monovalent saturated hydrocarbon group having 1 to 20 carbon atoms or the like; R11 and R12 each independently represent a halogen atom or an alkyl halide group having 1 to 6 carbon atoms; and m1 and m2 each independently represent an integer of 1 to 5.
    Type: Application
    Filed: February 19, 2019
    Publication date: January 7, 2021
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Keisuke INOUE, Yutaka KAWANISHI, Tetsuo AKASAKA