Patents by Inventor Azusa SUNAYAMA

Azusa SUNAYAMA 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 LAYERS, POLISHING LAYER, POLISHING PAD AND METHOD FOR MODIFYING POLISHING LAYER
    Publication number: 20210380845
    Abstract: Disclosed is a polyurethane for use in a polishing layer, including a carboxylic acid ester group, and a polyurethane preferably having a carboxylic acid ester group in at least one of a side chain, a main chain terminal, and a main chain skeleton is preferably used. Also disclosed is a method for modifying a polishing layer, including the steps of: preparing a polishing layer including a polyurethane having a carboxylic acid ester group; and hydrolyzing the carboxylic acid ester group of the polyurethane, to produce a carboxyl group.
    Type: Application
    Filed: November 1, 2019
    Publication date: December 9, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Azusa SUNAYAMA, Mitsuru KATO, Minori TAKEGOSHI, Chihiro OKAMOTO, Shinya KATO