Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8658830 | Method to recover organic tertiary amines from waste sulfuric acid | Stephan Brietzke, Peter Groer | 2014-02-25 |
| 8496905 | Method for the manufacture of an ammonium sulfate composition | Stephan Brietzke, Peter Groer | 2013-07-30 |
| 8309048 | Process for producing ammonium salts | Stephan Brietzke, Peter Groer, Michael J. Bayer | 2012-11-13 |
| 8303921 | Process for producing ammonium salts | Stephan Brietzke, Peter Groer, Michael J. Bayer | 2012-11-06 |
| 5710330 | Process for preparing alkanephosphonic anhydrides | Ernst I. Leupold, Gunter Roscher | 1998-01-20 |