Patents by Inventor Eiichi Kofune

Eiichi Kofune 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).

  • Process for dewatering sludge
    Patent number: 4587022
    Abstract: Sludge having a water content of less than 60% by weight is obtained by disintegrating primary dewatered sludge in a disintegrator to form sludge pieces having a layer of a dry dewatering additive while preventing the sludge from becoming like a slurry and then compressing the sludge pieces. The sludge thus obtained is combustible without requiring any further fuel.
    Type: Grant
    Filed: September 24, 1985
    Date of Patent: May 6, 1986
    Assignee: Hitachi Metals, Ltd.
    Inventors: Hideaki Shimizu, Eiichi Kofune, Haruhisa Saitoh, Katsuya Kobayashi