Patents by Inventor Hisako Nakashima

Hisako Nakashima 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 separating alkylnaphthalene
    Patent number: 6153808
    Abstract: In a method for separating at least one alkylnaphthalene from a stock mixture containing at least two alkylnaphthalenes selected from the group consisting of monoalkylnaphthalenes and dialkylnaphthalenes, a column packed with an optically active chromatographic packing is used for separation. The method can effectively separate a variety of alkylnaphthalenes from a mixture thereof.
    Type: Grant
    Filed: October 2, 1998
    Date of Patent: November 28, 2000
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Masahiro Motoyuki, Koji Yamamoto, Shingo Yoshida, Yonezo Matsumoto, Hisako Nakashima, Midori Kumazawa, Masaaki Matsuda