Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5741434 | Leather oiling preparations and their use | Wolfgang Ritter, Hans-Dieter Sitz, Rudolf Zauns-Huber | 1998-04-21 |
| 5728313 | Leather oiling compositions and their use | Wolfgang Ritter, Rudolf Zauns-Huber, Stefanie Ortanderl | 1998-03-17 |
| 5567343 | New leather oiling preparations and their use | Wolfgang Ritter, Hans-Dieter Sitz, Rudolf Zauns-Huber | 1996-10-22 |
| 5501707 | Aqueous dispersions of new amphiphilic co-oligomers for the washing- and cleaning-resistant oiling of leather and skins and their use | Ludwig Schieferstein, Rudolf Zauns-Huber, Joachim Conradi | 1996-03-26 |
| 5489389 | New leather oiling preparations and their use | Wolfgang Ritter, Rudolf Zauns-Huber, Stefanie Ortanderl | 1996-02-06 |
| 5476517 | Use of guerbet alcohols for preventing fatty spew on leather | Rudolf Zauns-Huber, Fredi Wolter | 1995-12-19 |
| 5468255 | Use of nonionic organic dialkyl compounds for preventing fatty spew on leather | Rudolf Zauns-Huber, Fredi Wolter | 1995-11-21 |
| 4938779 | Chrome tanning of leather with reduced waste of chromium | Hans-Herbert Friese, Rudolf Zauns | 1990-07-03 |
| 4309176 | Process for the oiling and impregnation of leather and pelts | Hans-Herbert Friese, Jurgen Plapper, Uwe Ploog | 1982-01-05 |
| 4272242 | Use of water-insoluble aluminosilicates in tanning process for the production of leather | Juergen Plapper, Klaus Schumann, Milan J. Schwuger, Heinz Smolka, Emanuel Arndt +1 more | 1981-06-09 |
| 4264318 | Water-insoluble aluminosilicates as tanning agents for the dressing of fur skin | Juergen Plapper, Klaus Schumann, Emanuel Arndt | 1981-04-28 |
| 4264319 | Water-insoluble aluminosilicates in the manufacture of leather | Juergen Plapper, Klaus Schumann, Emanuel Arndt | 1981-04-28 |
| 4221564 | Water-insoluble alkali metal aluminosilicates and polycarboxylic acids in the tanning process for the production of leather | Juergen Plapper, Klaus Schumann, Emanuel Arndt | 1980-09-09 |
| 4210416 | Fine-particulate alkali metal aluminosilicates in the process of washing and cleaning rawhides and fur skins | Juergen Plapper, Milan J. Schwuger, Heinz Smolka, Klaus Schumann, Emanuel Arndt | 1980-07-01 |