Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8163131 | Process for producing heatsealable filter materials | Gunter Heinrich, Martin Büchsel | 2012-04-24 |
| 7905985 | Process for producing heatsealable filter materials | Gunter Heinrich, Martin Büchsel | 2011-03-15 |
| 7344034 | Heatsealable filter materials | Gunter Heinrich, Martin Büchsel | 2008-03-18 |
| 6712932 | Method of producing self-cleaning and non-adhesive paper or paper-like material | Martin Büchsel, Sabine Schroft | 2004-03-30 |
| 6251989 | Oligomerized organopolysiloxane cocondensate, its production and its use for treatment of surfaces | Roland Edelmann, Albert-Johannes Frings, Michael Horn, Peter Jenkner, Eckhard Just +7 more | 2001-06-26 |
| 5980578 | Process for waterproofing leather at low pH-values and leathers manufactured thereby | Helmut Stoelcker | 1999-11-09 |
| 5931970 | Process for treating leathers with surfactants to improve water repellency | — | 1999-08-03 |
| 5686011 | Process for waterproofing materials having a fibrous structure and agents used to carry out this process | Helmut Lohmann, Leonardus Strijbos, Waldemar Inger | 1997-11-11 |
| 5433753 | Use of copolymers having polysiloxane units in the treatment of leather and furs | Kurt Dahmen, Richard Mertens, Helmut Lohmann, Horst Kilian | 1995-07-18 |
| 4980437 | Acrylic copolymers for re-tanning | Dolf Stockhausen, Hans-Georg Hartan, Alfons Landscheidt | 1990-12-25 |
| 4813968 | Retanning process | Dolf Stockhausen, Hans-Georg Hartan, Alfons Landscheidt | 1989-03-21 |
| 4631063 | Process for finish dressing minerally dressed leathers or those dressed by a combined method, using polymer dressings | Dolf Stockhausen, Rudolf Nowak, Miroslav Chmelir, Kurt Dahmen | 1986-12-23 |