Patents by Inventor Hideharu Kawagishi

Hideharu Kawagishi 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).

  • Cardboard sheet and process for producing the same
    Publication number: 20060099388
    Abstract: A corrugated fiberboard sheet includes three kinds of paperboards that are an outer paperboard, a corrugating medium and an inner paperboard. Each of the paperboards includes a paperboard of not less than three layers of raw material mainly of wastepaper. All the layers of each of the paperboards are given a waterproofing treatment. The ratio of incorporation of a fungusproofing agent and positions of incorporation satisfy the conditions (1) the ratio of incorporation of the fungusproofing agent in the outermost layers of the outer paperboard and the inner paperboard being in the range of 1 to 4%, (2) the ratio of incorporation of the fungusproofing agent in the innermost layers of the outer paperboard and the inner paperboard being in the range of 0.5 to 4% and (3) the ratio of incorporation of the fungusproofing agent in the opposite outermost layers of the corrugating medium being in the range of 0.5 to 4%.
    Type: Application
    Filed: July 28, 2003
    Publication date: May 11, 2006
    Applicant: Nippon Daishowa Paperboard co., ltd
    Inventors: Hideharu Kawagishi, Taisuke Isobe, Etsuji Kawamoto, Teruaki Sato, Fumioka Mizukami