Patents by Inventor Yoshiya OTA

Yoshiya OTA 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: 12366694
    Abstract: Provided are a retardation film that has a high heat resistance, has excellent formability and handleability even in a single-layer structure, has a negative thickness-direction retardation Rth value, and is suitable as a negative A-plate or a positive C-plate and a method for producing the film. The retardation film is formed of a stretched film of a polyester resin, contains a unit (A1) represented by the formula (1) as a diol unit (A) and a unit (B1) represented by the formula (2a) or (2b) as a dicarboxylic acid unit (B), and is a negative A-plate or a positive C-plate. In the formulae, Z1 and Z2 represent an aromatic hydrocarbon ring, R1, R2a, R2b, R3a and R3b represent a substituent, k, p1 and p2 denotes an integer of 0 to 8, q denotes an integer of 0 to 4, m1, m2, n1 and n2 denotes an integer of not less than 0, A1a and A1b represents an alkylene group, and A2a, A2b and A3 represents a divalent hydrocarbon group.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: July 22, 2025
    Assignee: OSAKA GAS CHEMICALS CO., LTD.
    Inventors: Yoshiya Ota, Shinichi Kamei, Shinsuke Miyauchi
  • Publication number: 20250215231
    Abstract: Provided are a novel ultraviolet absorber that has an excellent absorbing property for UV-A or UV-B, furthermore specifically absorbs only ultraviolet ray at a specific wavelength, and is capable of being used for general purposes, and an ultraviolet absorbing resin excellent in bleed-out resistance in addition to the characteristics described above. The ultraviolet absorber is a fluorene compound represented by the general formula (1) or a resin comprising the fluorene compound as a constituent unit.
    Type: Application
    Filed: March 23, 2023
    Publication date: July 3, 2025
    Inventors: Shogo SUGA, Yoshiya OTA, Keiko MINOKAMI, Mayato MITSUZANE
  • Publication number: 20250001726
    Abstract: A retardation film comprising: a first resin layer comprising resin A having negative intrinsic birefringence, wherein in-plane phase difference Ro(450) at an angle of incidence of 0° for light at a wavelength of 450 nm, in-plane phase difference Ro(550) at an angle of incidence of 0° for light at a wavelength of 550 nm, and in-plane phase difference Ro(650) at an angle of incidence of 0° for light at a wavelength of 650 nm meet Ro(450)>Ro(550)>Ro(650); and a second resin layer comprising resin B having positive intrinsic birefringence, wherein in-plane phase difference Ro(450) at an angle of incidence of 0° for light at a wavelength of 450 nm, in-plane phase difference Ro(550) at an angle of incidence of 0° for light at a wavelength of 550 nm, and in-plane phase difference Ro(650) at an angle of incidence of 0° for light at a wavelength of 650 nm meet Ro(450)>Ro(550)>Ro(650), the retardation film having a Nz coefficient of ?1.0 to 1.
    Type: Application
    Filed: November 18, 2022
    Publication date: January 2, 2025
    Inventors: Shogo SUGA, Yoshiya OTA, Yasuhiro SUDA
  • Publication number: 20240192418
    Abstract: Provided is a polarizer protective film which is a multilayer film having a polyester-based resin layer comprising a fluorene-based polyester resin, and an acrylic resin layer comprising an acrylic resin.
    Type: Application
    Filed: March 15, 2022
    Publication date: June 13, 2024
    Inventors: Shogo SUGA, Yoshiya OTA, Yasuhiro SUDA
  • Publication number: 20240168211
    Abstract: A phase difference film comprising one layer or multiple layers, wherein at least one layer thereof comprises a composition containing a polyester resin having arylated fluorene in a side chain, a relationship between phase differences Ro(450) and Ro(550) in an in-plane direction of the layer comprising the polyester resin is Ro(450)/Ro(550)?1.22, and the layer(s) is drawn.
    Type: Application
    Filed: March 15, 2022
    Publication date: May 23, 2024
    Inventors: Shogo SUGA, Yoshiya OTA, Katsuhide OKIMI, Yasuhiro SUDA
  • Publication number: 20230091159
    Abstract: A retardation film includes a polyester-series resin exhibiting a negative orientation birefringence and a forward wavelength dispersibility in retardation in combination with a polyamide-series resin exhibiting a positive orientation birefringence and a flat dispersibility in retardation. The polyester-series resin may contain a constitutional unit having a fluorene-9,9-diyl group, and the polyamide-series resin may contain a constitutional unit having an alicyclic skeleton. The polyester-series resin may contain at least one constitutional unit selected from a fluorenedicarboxylic acid unit (A1) containing a unit of the formula (1) and a fluorenediol unit (B1) containing a unit of the formula (2): wherein R1 and R2 each represent a substituent; k and m each denote an integer of 0 to 8; X1a, X1b, X2a, and X2b each represent a hydrocarbon group; A1a and A1b each represent an alkylene group; n1 and n2 each denote an integer of not less than 0.
    Type: Application
    Filed: December 24, 2020
    Publication date: March 23, 2023
    Applicant: Osaka Gas Chemicals Co., Ltd.
    Inventors: Yoshiya OTA, Shinichi KAMEl, Nagayoshi MASUDA
  • Publication number: 20210294013
    Abstract: Provided are a retardation film that has a high heat resistance, has excellent formability and handleability even in a single-layer structure, has a negative thickness-direction retardation Rth value, and is suitable as a negative A-plate or a positive C-plate and a method for producing the film. The retardation film is formed of a stretched film of a polyester resin, contains a unit (A1) represented by the formula (1) as a diol unit (A) and a unit (B1) represented by the formula (2a) or (2b) as a dicarboxylic acid unit (B), and is a negative A-plate or a positive C-plate. In the formulae, Z1 and Z2 represent an aromatic hydrocarbon ring, R1, R2a, R2b, R3a and R3b represent a substituent, k, p1 and p2 denotes an integer of 0 to 8, q denotes an integer of 0 to 4, m1, m2, n1 and n2 denotes an integer of not less than 0, A1a and A1b represents an alkylene group, and A2a, A2b and A3 represents a divalent hydrocarbon group.
    Type: Application
    Filed: August 7, 2019
    Publication date: September 23, 2021
    Applicant: Osaka Gas Chemicals Co., Ltd.
    Inventors: Yoshiya OTA, Shinichi KAMEI, Shinsuke MIYAUCHI