Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693867 | Process for isolating tetraphenylborates | Rudiger Baur, Hermann Fuchs, Hans-Tobias Macholdt, Wilfried Theiss | 1997-12-02 |
| 5401809 | Polymer ammonium borates and processes for their preparation | Detlef Wehle, Hans-Tobias Macholdt | 1995-03-28 |
| 5342723 | Biscationic acid amide and acid imide derivatives as charge controllers | Hans-Tobias Macholdt, Siegfried Schiebler, Erwin Dietz | 1994-08-30 |
| 5329046 | Biscationic acid amide and imide derivatives and processes for their preparation | Hans-Tobias Macholdt, Siegfried Schiessler, Erwin Dietz | 1994-07-12 |
| 5187038 | Polymeric ammonium compounds as charge control agents | Detlef Wehle, Hans-Tobias Macholdt | 1993-02-16 |
| 5147748 | Use of colorless highly fluorine-substituted phosphonium compounds as charge control agents for electrophotographic recording processes | Hans-Tobias Macholdt, Wolfgang Knaup | 1992-09-15 |
| 5069994 | Use of colorless, intensely fluorinated ammonium and iminium compounds as charge control agents for electrophotographic recording processes | Hans-Tobias Macholdt, Alexander Sieber, Frank Wehowsky, Gunther Prossel | 1991-12-03 |
| 5055619 | Phosphonium compounds and processes for their preparation | Hans-Tobias Macholdt, Wolfgang Knaup | 1991-10-08 |
| 5053537 | Ammonium and iminium compounds | Hans-Tobias Macholdt, Frank Wehowsky, Gunther Prossel | 1991-10-01 |