Patents by Inventor Kazuki KUMAZAWA

Kazuki 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).

  • OPTICAL FILM, RETARDER FILM, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20220011491
    Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase containing as a main component the polymerization unit A and a phase containing as a main component the polymerization unit B, and a value of Rth/d calculated from the thickness-direction retardation Rth (nm) and thickness d (nm) is 2.5×10-3 or more.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 13, 2022
    Applicant: ZEON CORPORATION
    Inventors: Kazuki KUMAZAWA, Hironari SUDEJI
  • OPTICAL FILM, RETARDER FILM, AND METHOD FOR MANUFACTURING SAME
    Publication number: 20220011490
    Abstract: An optical film formed of a resin C including a copolymer P containing a polymerization unit A and a polymerization unit B, wherein the optical film includes a phase separation structure that expresses structural birefringence, the phase separation structure includes a phase (A) containing as a main component the polymerization unit A and a phase (B) containing as a main component the polymerization unit B, and |n(A)?n(B)| is 0.12 or more.
    Type: Application
    Filed: November 8, 2019
    Publication date: January 13, 2022
    Applicant: ZEON CORPORATION
    Inventors: Kazuki KUMAZAWA, Hironari SUDEJI