Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5208075 | Sizing agent for staple fiber and filament yarns | Matthias Kroner, Manfred Niessner, Heinrich Hartmann, Dieter Voelker, Holger Schoepke | 1993-05-04 |
| 4520210 | Preparation of concentrated aqueous solutions of quaternization products of tertiary aminoalkyl esters or tertiary aminoalkylamides of acrylic or methacrylic acid | Kurt Schneider, Wilfried Heide, Heinrich Hartmann | 1985-05-28 |
| 4465599 | Flocculants based on polymers containing water-soluble dialkylaminoneopentyl (meth)acrylates | Hans Burkert, Dietmar Jung, Wilfried Heide, Heinrich Hartmann, Herbert Spoor | 1984-08-14 |
| 4465555 | Water-soluble polymers of di-C.sub.1 -C.sub.3 -alkylaminoneopentyl (meth)acrylates, and their use as retention agents, drainage agents and flocculants in papermaking | Friedrich Linhart, Dietmar Jung, Heinrich Hartmann, Herbert Spoor | 1984-08-14 |
| 4294873 | Manufacture of paper having a high dry strength and a low wet strength | Joachim Stedefeder, Walter Denzinger, Sigberg Pfohl | 1981-10-13 |