Patents Assigned to Ehimeken
  • Porous landscape pebble and method of manufacturing the same
    Patent number: 7462310
    Abstract: Fly ash containing unburned carbon of at least 10 wt % is pelletized using water as a binder without substantial addition of an inorganic binder, into unsintered particles each having an average diameter of 2 mm to 30 mm. The unsintered particles pelletized are sintered at a temperature which allows the landscape pebble to have a compression strength of at least 50 N and a water absorption rate of at least 40 wt %.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: December 9, 2008
    Assignees: Ohonokaihatsu Co., Ltd., Ehimeken
    Inventors: Teruo Ohono, Masahiko Kan