Patents by Inventor Ikuo Uno

Ikuo Uno 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).

  • Filler for heat-sensitive recording paper and process for producing the same
    Patent number: 5064473
    Abstract: Disclosed herein is a filler for heat-sensitive recording paper which comprises amorphous silica obtained by reacting hydrosilicofluoric acid and/or an alkali salt thereof with an alkali (such as ammonia and dimethylamine). The filler has a solid acid strength (pk.sub.a) of +6.8 to 3.3, and oil absorption value of 120 to 200 ml/100 g, a nitrogen adsorption specific surface area of 110 to 350 m.sup.2 /g (by BET method), and a water vapor adsorption specific surface area of 200 to 300 m.sup.2 /g (by BET method).
    Type: Grant
    Filed: February 13, 1990
    Date of Patent: November 12, 1991
    Assignees: Nissan Chemical Industries, Ltd., Shionogi & Co. Ltd.
    Inventors: Masao Kubo, Akihiro Shiroishi, Ikuo Uno, Takashi Nishiyama