Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5041597 | Surface-active sulfophosphoric-acid-(partial)-alkyl-esters | Bernd Fabry, Friedrich Pieper, Guenter Uphues | 1991-08-20 |
| 4956116 | Surface-active, saturated sulfophosphoric acid-(partial)-alkyl esters | Bernd Fabry, Friedrich Pieper, Guenter Uphues | 1990-09-11 |
| 4946471 | Adhesion promoter for leather finishing | Gerhard Kaindl, Ludwig Schieferstein | 1990-08-07 |
| 4938779 | Chrome tanning of leather with reduced waste of chromium | Emil Ruscheinsky, Rudolf Zauns | 1990-07-03 |
| 4903362 | Sulfited fats as oiling agents for leather and skins | Friedrich Pieper, Reinhard Bosse | 1990-02-27 |
| 4799932 | Oiling agents based on sulfosuccinic acid monoamides | Uwe Ploog, Wolfgang Prinz | 1989-01-24 |
| 4800045 | Sulfited fats | Friedrich Pieper, Reinhard Bosse | 1989-01-24 |
| 4772289 | Primer for leather finishes | Hermann Anzinger, Gerhard Kaindl, Michael Marschner, Uwe Ploog, Ludwig Schieferstein +2 more | 1988-09-20 |
| 4755187 | Method for producing waterproof leather | Uwe Ploog, Wolfgang Prinz | 1988-07-05 |
| 4744794 | Leather fatliquoring agents combinable with tanning and retanning compositions | Uwe Ploog, Friedrich Pieper | 1988-05-17 |
| 4741738 | Sulfonation of fats and oils | Friedrich Pieper | 1988-05-03 |
| 4729767 | Amphoteric fatliquoring composition | Uwe Ploog, Gunter Uphues | 1988-03-08 |
| 4527992 | Process for the production of waterproof leathers and skins | Wolfgang Prinz | 1985-07-09 |
| 4451261 | Preparation of lubricating agents for leathers and furs | Wolf-Dieter Willmund, Manfred Biermann, Horst Baumann, Friedrich Pieper | 1984-05-29 |
| 4309176 | Process for the oiling and impregnation of leather and pelts | Jurgen Plapper, Uwe Ploog, Emil Ruscheinsky | 1982-01-05 |