Patents by Inventor Toshikatsu Nishioka

Toshikatsu Nishioka 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).

  • Immersion oil for microscopy
    Patent number: 3979301
    Abstract: An immersion oil for microscopy is produced by blending 10 to 90 parts by weight of chain hydrocarbon having 200 to 5,000 of molecular weight and 10 to 90 parts by weight of specific diphenylmethane derivatives or bis(.alpha.-alkylbenzyl) alkylbenzene derivatives or 2,4-diphenyl-4-dimethylphenylbutane derivatives.The product obtained has excellent values in the various properties such as light dispersion, refractive index, viscosity and the like. Furthermore, it has an excellent advantage that the properties such as Abbe's number and the like are easily adjustable.
    Type: Grant
    Filed: June 17, 1975
    Date of Patent: September 7, 1976
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Katsuyoshi Ushioda, Toshikatsu Nishioka, Hiroshi Okada