Patents by Inventor Arvid Emanuel Hellberg

Arvid Emanuel Hellberg 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).

  • Ensiling of green fodder with hexamethylene tetramine and sodium nitrite
    Patent number: 3961079
    Abstract: When ensiling fodder, such as grass, clover, lucerne, it has been found useful to add hexamethylenetetramine and a nitrite to the fodder.
    Type: Grant
    Filed: February 28, 1974
    Date of Patent: June 1, 1976
    Assignee: Plate Kofasil Gesellschaft mit beschrankter Haftung
    Inventor: Arvid Emanuel Hellberg