Patents by Inventor Tomiyuki Maeda

Tomiyuki Maeda 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).

  • Concentration and transfer methods for a chromatogram and an LC/IR measuring method
    Patent number: 5306645
    Abstract: Methods of conducting Thin Layer Chromatography (TLC) involving using a TLC plate having sample spots and including no support material, placing the TLC plate on a porous substrate, and allowing solvent to move upwardly from the porous substrate toward the TLC plate by capillary action to be vaporized from the surface of the TLC plate, thereby concentrating the sample spots developed in the thin layer on the surface of the TLC plate.
    Type: Grant
    Filed: January 30, 1991
    Date of Patent: April 26, 1994
    Assignee: Shimadzu Corporation
    Inventors: Hiroshi Yamamoto, Katsuhiko Ichimura, Kenji Nakamura, Tomiyuki Maeda, Takahiro Tajima, Kiyoshi Wada