Patents by Inventor Azusa OSHITA

Azusa OSHITA 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).

  • Polyurethane for polishing layer, polishing layer including polyurethane and modification method of the polishing layer, polishing pad, and polishing method
    Patent number: 11787894
    Abstract: A Schiff base-containing chain extender may be a diol having a Schiff base or a derivative thereof, as well as a polyurethane produced using the same and a modification method thereof, and a polishing layer including a polyurethane and a polishing method using the polishing layer.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: October 17, 2023
    Assignee: KURARAY CO., LTD.
    Inventors: Azusa Oshita, Minori Takegoshi, Mitsuru Kato, Chihiro Okamoto, Shinya Kato
  • MODIFICATION METHOD OF POLYURETHANE, POLYURETHANE, POLISHING PAD, AND MODIFICATION METHOD OF POLISHING PAD
    Publication number: 20210276143
    Abstract: A modification method of a polyurethane, including the steps of: preparing a polyurethane having an ethylenically unsaturated bond; and treating the polyurethane with a liquid containing a compound having a conjugated double bond, or a modification method of a polyurethane, including the steps of: preparing a polyurethane having a conjugated double bond; and treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used.
    Type: Application
    Filed: April 26, 2019
    Publication date: September 9, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Azusa OSHITA, Mitsuru KATO, Minori TAKEGOSHI, Chihiro OKAMOTO, Shinya KATO
  • Polyurethane for polishing layer, polishing layer including polyurethane and modification method of the polishing layer, polishing pad, and polishing method
    Patent number: 11053339
    Abstract: Disclosed herein are polyurethanes useful for polishing layers, where the polyurethane is a polyurethane having a Schiff base. Also disclosed herein are polishing layers containing the polyurethanes, polishing methods that use the polishing layers, and a modification method including a step of converting the Schiff base into at least one functional group selected from an aldehyde group, a carboxylic acid group, a hydroxyl group, and an amino group.
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: July 6, 2021
    Assignee: KURARAY CO., LTD.
    Inventors: Azusa Oshita, Minori Takegoshi, Mitsuru Kato, Chihiro Okamoto, Shinya Kato
  • POLYURETHANE FOR POLISHING LAYER, POLISHING LAYER INCLUDING POLYURETHANE AND MODIFICATION METHOD OF THE POLISHING LAYER, POLISHING PAD, AND POLISHING METHOD
    Publication number: 20210087325
    Abstract: A Schiff base-containing chain extender may be a diol having a Schiff base or a derivative thereof, as well as a polyurethane produced using the same and a modification method thereof, and a polishing layer including a polyurethane and a polishing method using the polishing layer.
    Type: Application
    Filed: November 30, 2020
    Publication date: March 25, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Azusa OSHITA, Minori TAKEGOSHI, Mitsuru KATO, Chihiro OKAMOTO, Shinya KATO
  • POLYURETHANE FOR POLISHING LAYER, POLISHING LAYER INCLUDING POLYURETHANE AND MODIFICATION METHOD OF THE POLISHING LAYER, POLISHING PAD, AND POLISHING METHOD
    Publication number: 20200190247
    Abstract: Disclosed herein are polyurethanes useful for polishing layers, where the polyurethane is a polyurethane having a Schiff base. Also disclosed herein are polishing layers containing the polyurethanes, polishing methods that use the polishing layers, and a modification method including a step of converting the Schiff base into at least one functional group selected from an aldehyde group, a carboxylic acid group, a hydroxyl group, and an amino group.
    Type: Application
    Filed: April 27, 2018
    Publication date: June 18, 2020
    Applicant: KURRAY CO., LTD.
    Inventors: Azusa OSHITA, Minori TAKEGOSHI, Mitsuru KATO, Chihiro OKAMOTO, Shinya KATO