Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5621027 | Dyestuffs for bulk dyeing plastics | Peter Roschger, Volker Hederich, Stephan Michaelis | 1997-04-15 |
| 5286420 | Production of light polarizing films | Uwe Claussen, Edouard Roche | 1994-02-15 |
| 5272259 | Stilbene dyestuffs and light-polarizing films or sheets containing stilbene | Uwe Claussen | 1993-12-21 |
| 5213582 | Light-polarizing films or foils containing triphendioxazine or triphendithiazine dyes with good dichrditic properties | Peter Wild, Uwe Claussen | 1993-05-25 |
| 5175336 | Fluoromethylated polycyanobenzenes, their alkali metal cyanide adducts, processes for their preparation and use of the fluoromethylated polycyanobenzenes | Gunther Beck, Wolfgang von der Emden, Helmut Heitzer, Ernst Kysela, Albrecht Marhold | 1992-12-29 |
| 5122557 | Light polarizing films or foils and dyes for their production | Uwe Claussen | 1992-06-16 |
| 5093401 | Aqueous casting solutions for the production of light-polarizing sheets or films based on polyvinyl alcohol | Uwe Claussen | 1992-03-03 |
| 5007942 | Light-polarizing films or sheets containing stilbene dyestuffs | Uwe Claussen | 1991-04-16 |
| 4863634 | Anthraquinone dyestuffs | Uwe Claussen, Rutger Neeff | 1989-09-05 |
| 4689171 | Anthraquinone dyestuffs, their preparation and use and dichroic material containing these anthraquinone dyestuffs | Martin Blunck, Uwe Claussen, Rutger Neeff | 1987-08-25 |
| 4596666 | Aryl-mercapto anthraquinone dyestuffs, their preparation and use and dichroic material containing aryl-mercapto anthraquinone dyestuffs | Martin Blunck, Uwe Claussen, Rutger Neeff | 1986-06-24 |
| 4521341 | Process for the preparation of 1,4-diamino-anthraquinone-2-sulphonic acid | Rutger Neoff | 1985-06-04 |
| 4422973 | Process for the preparation of 1,4-diamino-2,3-dicyano-anthraquinone | Rutger Neeff | 1983-12-27 |
| 4294769 | Process for the preparation of 1,4-diamino-2,3-dicyano-anthraquinones | Rutger Neeff, Heinz Scheiter | 1981-10-13 |
| 4294578 | Colorants | Rutger Neeff | 1981-10-13 |
| 4278434 | Transfer printing process and printing inks and temporary supports for carrying out this process | Rutger Neeff, Robert Kuth | 1981-07-14 |
| 4264511 | Anthraquinone compounds | Rutger Neeff | 1981-04-28 |