Patents by Inventor Hans-Rudolf Lange

Hans-Rudolf Lange 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 diagnostic device for the determination of ammonia and of substrates which react with the formation of ammonia
    Patent number: 4223089
    Abstract: Diagnostic device for the determination of ammonia having a handle, an ammonia indicator layer thereon and an alkaline buffer-containing reaction layer positioned above the indicator layer a distance of 10 to 200 microns by a spacer member. The reaction layer is readily separated from the indicator layer to reveal the latter at the end of the ammonia test.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: September 16, 1980
    Assignee: Boehringer Mannheim GmbH
    Inventors: Anselm Rothe, Adolf K. Selle, Hans-Rudolf Lange, Walter Rittersdorf, Wolfgang Werner