Patents by Inventor Izumi Motoyama

Izumi Motoyama 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 immersion oil
    Patent number: 6221281
    Abstract: A liquid immersion oil which is used in optical systems in any of the fields of microscopes, fluorescence microscopes, optical measurements and other related fields includes a liquid polyolefine or a liquid copolymer of butylene (&agr;-butylene, &bgr;-butylene) and another olefine, blended with an aromatic compound, or blended with an aromatic compound and a paraffin compound.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: April 24, 2001
    Assignee: Nikon Corporation
    Inventor: Izumi Motoyama