Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6563112 | Method for enhancing the contrast for a transmission electron microscope | Ansgar Haking, Karsten Richter, Michael Trendelenburg | 2003-05-13 |
| 6521604 | Compounds containing boron for energy-filtering transmission electron microscopy and for boron neutron-capture therapy | Manfred Wiessler, Stefan Raddatz, Eberhard Spiess, Michael Trendelenburg | 2003-02-18 |
| 5319083 | Black peryene-3,4,9,10-tetracarboxylic diimides, their preparation and use | — | 1994-06-07 |
| 5154770 | Mix-crystal pigments based on perylenetetracarbimides, process for their preparation and their use | Ernst Spietschka | 1992-10-13 |
| 4831140 | Process for the preparation of arylimides of perylene-3,4,9,10-tetracarboxylic acid | Ernst Spietschka | 1989-05-16 |
| 4786575 | Pigment for electrophotographic recording processes | Hans-Tobias Macholdt, Alexander Sieber | 1988-11-22 |
| 4769460 | Mix-crystal pigments based on perylenetetracarbimides, process for preparing and their use | Ernst Spietschka | 1988-09-06 |
| 4742170 | Mix-crystal pigments based on perylenetetracarbimides, process for their preparation, and their use | Ernst Spietschka | 1988-05-03 |
| 4709029 | Process for the preparation of perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides | Ernst Spietschka | 1987-11-24 |
| 4599408 | Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides | Ernst Spietschka | 1986-07-08 |
| 4594420 | Perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimide and monoimidazolide compounds, processes for their preparation and their use | Ernst Spietschka | 1986-06-10 |
| 4501906 | Monoalkali metal salts of perylene-3,4,9,10-tetracarboxylic acid monoanhydride and process for their manufacturing | Ernst Spietschka | 1985-02-26 |
| 4242139 | Water soluble benzoxanthene dyestuffs for fluorescent inks | — | 1980-12-30 |