Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8920605 | Fluorescent whitening agent compositions | Bernhard Hunke, Andrei Tauber, Michael Kraemer | 2014-12-30 |
| 8608907 | Fluorescent whitening agent compositions | Bernhard Hunke, Michael Kraemer, Andrei Tauber | 2013-12-17 |
| 8354041 | Composition and process for whitening paper | Bernhard Hunke, Michael Kraemer, Andrei Tauber | 2013-01-15 |
| 6797670 | Microcapsules having polyurea walls | Martin Kleban, Jurgen Weisser | 2004-09-28 |
| 6586107 | Microcapsules having polyurea walls | Jurgen Weisser | 2003-07-01 |
| 5552365 | Pressure-sensitive recording material which comprises natural oils and/or derivatives thereof | Horst Berneth, Jurgen Weisser | 1996-09-03 |
| 5439869 | Thermoreactive recording material of particular stability | Pieter Ooms, Christian Rasp | 1995-08-08 |
| 5368968 | Modified polyester resins, a process for their preparation and toners containing such polyester resins | Rolf Wehrmann, Matthias Kocher, Harald Pielartzik | 1994-11-29 |
| 5292712 | Thermoreactive recording material having particular stability | Heinrich Schrage, Pieter Ooms, Hans-Josef Buysch | 1994-03-08 |
| 5236782 | Microcapsules | Norbert Weimann, Josef Vogel | 1993-08-17 |
| 5134113 | Thermoreactive recording material | Hubertus Psaar, Siegfried Korte | 1992-07-28 |
| 5118814 | Tetraindolyl-heptamethine derivatives | Horst Berneth, Hubertus Psaar | 1992-06-02 |
| 5092925 | Mixture of 3,1-benzoxazines and fluoranes | Horst Berneth, Gert Jabs | 1992-03-03 |
| 5072017 | Process for the preparation of P-substituted O-benzylphenols | Hans-Josef Buysch, Peter Mues, Lothar Puppe | 1991-12-10 |
| 5068434 | Process for the preparation of N-alkylated anilines | Hans-Josef Buysch, Lothar Puppe | 1991-11-26 |
| 5024987 | Recording material | Gert Jabs, Horst Berneth, Artur Botta | 1991-06-18 |
| 4940817 | Process for the preparation of n-alkylanilines | Hans-Josef Buysch, Lothar Puppe | 1990-07-10 |