Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4789580 | Process of reducing higher metal oxides to lower metal oxides | Martin Hirsch, Harry Serbent | 1988-12-06 |
| 4220631 | Process of calcining limestone or hydrated lime in a rotary kiln | Harry Serbent, Heinz Eichberger, Herbert Lausch, Horst Steinhofel | 1980-09-02 |