Patents by Inventor Bertil Hagander

Bertil Hagander 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).

  • Patent number: 5746802
    Abstract: In a method for composting organic material, the material to be composted is placed, in disintegrated form, in a container. The material to be composted is introduced into the inner, lower part of an accumulation of disintegrated material which was previously introduced into the container. The material introduced into the container is then degraded biologically in zones which, are moved upwards as additional disintegrated material is being introduced into the container. Finally composted material is withdrawn from the upper part of the accumulation of material. A device for carrying out the method has a container and a material feed unit. The material feed unit has a feed tube with an outlet end which opens centrally in the lower part of the container, a material inlet communicating with the feed tube to receive the material to be composted, and a press for pressing the material in the feed tube toward the outlet end of the feed tube.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: May 5, 1998
    Inventor: Bertil Hagander