Patents by Inventor Hideaki Ishitoku

Hideaki Ishitoku 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).

  • Lignin composition, method of producing the same and dispersing agent for cement used the same
    Patent number: 5811527
    Abstract: A lignin composition having a content of aluminum or iron or both at 0.05 to 5 wt. % (based on the solids of the lignin solution) and a content of extracts with chlorotrifluoroethylene dimer at 0.01 to 0.4 wt. % (based on solids in lignin solution). The lignin compositions possess high surface tension and are suitable as dispersing agents for cement.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: September 22, 1998
    Assignee: Nippon Paper Industries Co., Ltd.
    Inventors: Hideaki Ishitoku, Toshihiro Sugiwaki, Masanobu Kawamura, Tomoyuki Nakamoto