Patents by Inventor Yumiko Ono

Yumiko Ono 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).

  • Liquid chromatograph and sample introducing apparatus
    Patent number: 9003868
    Abstract: Disclosed herein is a sample introducing apparatus which is designed such that the analytical flow path runs from the needle to the separation column without the flow path switching means placed at the downstream side of the needle. This design reduces dead volume, which in turn reduces the diffusion of the sample injected into the analytical flow path. Moreover, the absence of the flow path switching means at the downstream side of the needle to inject a sample into the analytical flow path eliminates connection of the pipe with the flow path switching means. This prevents the sample from remaining in the connecting part, thereby reducing sample carry-over and improving the accuracy of analysis.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: April 14, 2015
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yumiko Ono, Kimihiko Ishii, Eri Yamashita
  • LIQUID CHROMATOGRAPH AND SAMPLE INTRODUCING APPARATUS
    Publication number: 20120279284
    Abstract: Disclosed herein is a sample introducing apparatus which is designed such that the analytical flow path runs from the needle to the separation column without the flow path switching means placed at the downstream side of the needle. This design reduces dead volume, which in turn reduces the diffusion of the sample injected into the analytical flow path. Moreover, the absence of the flow path switching means at the downstream side of the needle to inject a sample into the analytical flow path eliminates connection of the pipe with the flow path switching means. This prevents the sample from remaining in the connecting part, thereby reducing sample carry-over and improving the accuracy of analysis.
    Type: Application
    Filed: May 8, 2012
    Publication date: November 8, 2012
    Applicant: Hitachi High-Technologies Corporation
    Inventors: Yumiko ONO, Kimihiko Ishii, Eri Yamashita
  • Liquid chromatograph and sample introducing apparatus
    Patent number: 8191404
    Abstract: Disclosed herein is a sample introducing apparatus which is designed such that the analytical flow path runs from the needle to the separation column without the flow path switching means placed at the downstream side of the needle. This design reduces dead volume, which in turn reduces the diffusion of the sample injected into the analytical flow path. Moreover, the absence of the flow path switching means at the downstream side of the needle to inject a sample into the analytical flow path eliminates connection of the pipe with the flow path switching means. This prevents the sample from remaining in the connecting part, thereby reducing sample carry-over and improving the accuracy of analysis.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: June 5, 2012
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yumiko Ono, Kimihiko Ishii, Eri Yamashita
  • LIQUID CHROMATOGRAPH AND SAMPLE INTRODUCING APPARATUS
    Publication number: 20090078031
    Abstract: Disclosed herein is a sample introducing apparatus which is designed such that the analytical flow path runs from the needle to the separation column without the flow path switching means placed at the downstream side of the needle. This design reduces dead volume, which in turn reduces the diffusion of the sample injected into the analytical flow path. Moreover, the absence of the flow path switching means at the downstream side of the needle to inject a sample into the analytical flow path eliminates connection of the pipe with the flow path switching means. This prevents the sample from remaining in the connecting part, thereby reducing sample carry-over and improving the accuracy of analysis.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 26, 2009
    Inventors: Yumiko ONO, Kimihiko Ishii, Eri Yamashita