Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4348334 | Process for producing the magnesium salt of 3-nitro-naphthalene-1,5-disulfonic acid (nitro-Armstrong's acid) | Bernhard Albrecht, Hans-Helmut Frey, Horst Behre, Lutz Kienitz, Wolfgang Schenk +2 more | 1982-09-07 |
| 4217304 | Continuous reduction process | Bernhard Albrecht, Hans-Helmut Frey, Paul Havalda, Georg Halfter | 1980-08-12 |