Patents by Inventor Yoshinari Ohwaku

Yoshinari Ohwaku 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).

  • Packing materials for gas separation columns
    Patent number: 4145506
    Abstract: Packing materials for gas chromatography columns are disclosed. The columns can be used to separate polar compounds with low boiling points. The packing materials, which consist mainly of particulate RSiO.sub.3/2 resin, where R is alkyl, aryl or alkenyl, have excellent separation efficiencies.
    Type: Grant
    Filed: November 4, 1977
    Date of Patent: March 20, 1979
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Yokichi Yamamoto, Yoshinari Ohwaku