Patents by Inventor Wilhelm Jan-Held

Wilhelm Jan-Held 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 the temporary storage of recyclable liquid wastes in underground salt caverns
    Patent number: 4435290
    Abstract: Salt caverns or cavities are used only for intermediate storage and not for permanent storage of liquid pumpable wastes, to avoid above ground installations for such operations as phase separation, neutralization and sedimentation. The caverns may be used in combination or in series.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: March 6, 1984
    Assignee: Wintershall AG
    Inventors: Walter Lindorfer, Wilhelm Jan-Held