| 5131981 |
Coloring paper |
Erwin Hahn, Georg Henning, Manfred Mielke, Hans-Juergen Degen |
1992-07-21 |
| 4978427 |
Water-soluble copolymers containing vinylamine units as wet strength and dry strength agent for paper |
Michael Kroener, Heinrich Hartmann, Walter Denzinger |
1990-12-18 |
| 4880497 |
Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper |
Michael Kroener, Heinrich Hartmann, Walter Denzinger |
1989-11-14 |
| 4818341 |
Production of paper and paperboard of high dry strength |
Hans-Juergen Degen, Volkmar Weberndoerfer, Gerd Rehmer, Michael Kroener, Andreas Stange |
1989-04-04 |
| 4804387 |
Liquid black dye mixture |
Hans-Juergen Degen, Rudolf Bermes |
1989-02-14 |
| 4784724 |
Making paper which has a high dry strength |
Volkmar Weberndoerfer, Heinrich Hartmann, Friedrich Linhart |
1988-11-15 |
| 4774285 |
Preparation of water-soluble copolymers containing vinylamine units, and their use as wet strength agents and dry strength agents for paper |
Michael Kroener, Heinrich Hartmann, Walter Denzinger |
1988-09-27 |
| 4294873 |
Manufacture of paper having a high dry strength and a low wet strength |
Juergen Hartmann, Joachim Stedefeder, Walter Denzinger |
1981-10-13 |
| 4191692 |
Manufacture of tocopherol |
Paul Grafen, Henning Kroesche, Bernhard Schulz, Joachim Paust |
1980-03-04 |
