Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5068094 | Process for the removal of cadmium ions from phosphoric acid resulting from a wet process | Klaus Frankenfeld, Gerhard Eich, Klaus Endrich | 1991-11-26 |
| 4762692 | Process for the precipitation and separation of cadmium sulphide from the raffinates derived from phosphoric acid purification | Klaus Frankenfeld, Peter Ruschke, Gerhard Eich | 1988-08-09 |
| 4385036 | Process of obtaining uranium and uranium compounds from phosphoric acid | Klaus Frankenfeld, Rainer Lehmann, Inge Zintl | 1983-05-24 |
| 4383978 | Process of obtaining uranium and uranium compounds from phosphoric acid | Klaus Frankenfeld, Rainer Lehmann, Inge Zintl | 1983-05-17 |