Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6303213 | Substrates secure against unauthorized copying and their production | Horst Berneth, Uwe Claussen, Rolf Richter, Gunter Franke | 2001-10-16 |
| 6254644 | Biologically degradable leather | Hanns P. Muller, Helmut Reiff, Jurgen Reiners, Gerd-Friedrich Renner, Rainhard Koch +1 more | 2001-07-03 |
| 6143132 | Process for imparting wet strength to paper | Hans-Josef Laas, Helmut Reiff, Joachim Konig, Jurgen Reiners, Harald Faika | 2000-11-07 |
| 6090871 | Paper finishing aid | Jurgen Reiners, Jurgen Kopp, Joachim Konig, Eckhard Wenderoth, Bernhard Jansen +1 more | 2000-07-18 |
| 5917083 | Process for the manufacture of allophanates having isocyanate groups | Klaus Konig, Helmut Reiff, Christian Wamprecht | 1999-06-29 |
| 5898049 | Biodegradable and compostable shaped bodies | Hanns P. Muller, Rainhard Koch | 1999-04-27 |
| 5888400 | Process for preparing low-salt preparations of condensation products | Edzard Tholema, Wolfgang Zarges | 1999-03-30 |
| 5885474 | Use of polyaspartic acid amides as leather auxiliary products | Jurgen Reiners, Manfred Schnee, Torsten Groth, Winfried Joentgen, Gerd Schmitz +1 more | 1999-03-23 |
| 5846383 | Process for producing structurally resistant paper | Klaus Konig | 1998-12-08 |
| 5820634 | Process for tanning leather | Fritz Novotny, Helmut Reiff | 1998-10-13 |
| 5770651 | Use of oligourethanes as formulating agents for aqueous pigment preparations | Hans-Werner Muller, Fritz Novotny | 1998-06-23 |
| 5739249 | Chlorine-free multifunctional resins for paper finishing | Jurgen Reiners, Hans-Josef Laas, Joachim Konig, Helmut Reiff, Joachim Probst +3 more | 1998-04-14 |
| 5618317 | Bisulfite-blocked polyisocyanates as tanning agents | Helmut Reiff | 1997-04-08 |
| 5580355 | Leather tanning agent and standardizing agents for dyestuffs | Torsten Groth, Winfried Joentgen, Ulrich Muller, Bruno Bomer, Guido Martin Bomer | 1996-12-03 |
| 5518764 | Process for coating textiles | Martin Reiner, Rolf Langel, Hans-Albert Ehlert | 1996-05-21 |
| 5503714 | Chlorine-free multifunctional resins for paper finishing | Jurgen Reiners, Hans-Josef Laas, Joachim Konig, Helmut Reiff, Joachim Probst +3 more | 1996-04-02 |
| 5468257 | Process for dying leather with pigments and cationic binders | Joachim Probst, Fritz Novotny, Ludger Heiliger | 1995-11-21 |
| 5417723 | Use of ester urethanes for retanning | Wilhelm Krummel, Joachim Kochta | 1995-05-23 |
| 5342556 | Microcapsules made of isocyanates with groups containing polyethylene oxide | Jurgen Weisser, Helmut Reiff | 1994-08-30 |
| 5268416 | Oligourethanes as forming agents for non-aqueous pigment preparations | Hans-Werner Muller, Fritz Novotny | 1993-12-07 |
| 5103521 | Leather treatment agent and its use | Manfred Dietrich, Hans-Werner Muller, Gunther Held | 1992-04-14 |
| 5074884 | Process for the dyeing of leather with anionic dyes and polyaminoamide resin as dyeing auxiliary | Winfried Mennicke | 1991-12-24 |
| 5009921 | Process for finishing leather | Heinrich Strenger, Karl-Arnold Weber, Hans-Werner Muller, Horst Zapfel, Axel Hummel | 1991-04-23 |
| 4895883 | Polyurethane ureas | Joseph Pedain, Karl H. Pisaric, Walter Schroer, Wilhelm Thoma, Karl-Arnold Weber | 1990-01-23 |
| 4831075 | Leather treatment agent | Helmut Woynar, Hans-Werner Muller | 1989-05-16 |