Patents by Inventor Takayoshi NAKAHARA

Takayoshi NAKAHARA 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 REDUCING METAL OF SUGAR-ALCOHOL COMPOUND AND SUGAR-ALCOHOL COMPOUND
    Publication number: 20170369407
    Abstract: The present invention provides a method for reducing a metal of a sugar-alcohol compound, the method including the steps of (A) protecting a hydroxyl group of a sugar-alcohol compound containing metal impurities with a protecting group, (B) removing the metal impurities from the sugar-alcohol compound having the hydroxyl group protected with the protecting group, and (C) eliminating the protecting group of the sugar-alcohol compound from which the metal has been removed. There can be provided a method for reducing a metal of a sugar-alcohol compound that can provide a sugar-alcohol compound with a suitable quality for the semiconductor apparatus manufacturing process.
    Type: Application
    Filed: May 3, 2017
    Publication date: December 28, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takayoshi NAKAHARA, Takeru WATANABE, Seiichiro TACHIBANA, Tsutomu OGIHARA