Patents by Inventor Bernd Steinbrech

Bernd Steinbrech 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 separation and purification of platinum group metals (I)
    Patent number: 4571266
    Abstract: There is described a process for the separation and purification of the platinum group metals from base metal out of acidic aqueous solutions. For this purpose there is used a substituted thiourea of the formulaR.sub.1 R.sub.2 N--CS--NH--CO--R.sub.3orR.sub.1 R.sub.2 N--CS--NH--COOR.sub.3as the extraction agent. Preferably there are employed N,N-dialkyl-N'-benzoylthiourea wherein R.sub.1 and R.sub.2 are methyl, n-butyl, or n-hexyl.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: February 18, 1986
    Assignee: Degussa Aktiengesellschaft
    Inventors: Karl-Heinz Konig, Michael Schuster, Gerd Schneeweis, Bernd Steinbrech, Rainer Schlodder