Patents by Inventor Yumi Ohsaku

Yumi Ohsaku 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).

  • METHOD FOR PRODUCING RING-OPENING METATHESIS POLYMER HYDRIDE, AND RESIN COMPOSITION
    Publication number: 20180127520
    Abstract: A method for producing a hydrogenated ring-opening metathesis polymer includes subjecting a cyclic olefin to ring-opening metathesis polymerization in the presence of a polymerization catalyst to produce a ring-opening metathesis polymer, and hydrogenating at least some of carbon-carbon double bonds of the ring-opening metathesis polymer, at least one ruthenium compound selected from a group made of a ruthenium compound represented by a formula (I), (II), (III), and (IV) being used as the polymerization catalyst; and a resin composition having a hydrogenated ring-opening metathesis polymer produced by this method. It is possible to industrially advantageously produce a hydrogenated ring-opening metathesis polymer that exhibits especially excellent light transmittance.
    Type: Application
    Filed: November 2, 2017
    Publication date: May 10, 2018
    Applicant: ZEON CORPORATION
    Inventors: Takashi TSUTSUMI, Kazunori TAGUCHI, Yumi OHSAKU
  • Method for producing ring-opening metathesis polymer hydride, and resin composition
    Patent number: 9850325
    Abstract: A method for producing a hydrogenated ring-opening metathesis polymer includes subjecting a cyclic olefin to ring-opening metathesis polymerization in the presence of a polymerization catalyst to produce a ring-opening metathesis polymer, and hydrogenating at least some of carbon-carbon double bonds of the ring-opening metathesis polymer, at least one ruthenium compound selected from a group made of a ruthenium compound represented by a formula (I), (II), (III), and (IV) being used as the polymerization catalyst; and a resin composition having a hydrogenated ring-opening metathesis polymer produced by this method. It is possible to industrially advantageously produce a hydrogenated ring-opening metathesis polymer that exhibits especially excellent light transmittance.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: December 26, 2017
    Assignee: ZEON CORPORATION
    Inventors: Takashi Tsutsumi, Kazunori Taguchi, Yumi Ohsaku
  • METHOD FOR PRODUCING RING-OPENING METATHESIS POLYMER HYDRIDE, AND RESIN COMPOSITION
    Publication number: 20150051353
    Abstract: A method for producing a hydrogenated ring-opening metathesis polymer includes subjecting a cyclic olefin to ring-opening metathesis polymerization in the presence of a polymerization catalyst to produce a ring-opening metathesis polymer, and hydrogenating at least some of carbon-carbon double bonds of the ring-opening metathesis polymer, at least one ruthenium compound selected from a group made of a ruthenium compound represented by a formula (I), (II), (III), and (IV) being used as the polymerization catalyst; and a resin composition having a hydrogenated ring-opening metathesis polymer produced by this method. It is possible to industrially advantageously produce a hydrogenated ring-opening metathesis polymer that exhibits especially excellent light transmittance.
    Type: Application
    Filed: March 14, 2013
    Publication date: February 19, 2015
    Inventors: Takashi Tsutsumi, Kazunori Taguchi, Yumi Ohsaku