Patents by Inventor Karl H. Schweigert

Karl H. Schweigert 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 and device for production of nitrogen
    Patent number: 5037462
    Abstract: In a process for production of nitrogen by low-temperature rectification of air, the air is compressed and divided into two partial streams of which the first partial stream is cooled and fed to a rectification zone, while the second partial stream is further compressed, cooled, expanded and then also fed to the rectification zone. The first partial stream, before it is fed to the rectification zone, is brought into heat exchange relation with the bottom liquid of the rectification zone. A nitrogen product stream is removed from an upper section of the rectification zone.
    Type: Grant
    Filed: April 1, 1987
    Date of Patent: August 6, 1991
    Assignee: Linde Aktiengesellschaft
    Inventor: Karl H. Schweigert