Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4272242 | Use of water-insoluble aluminosilicates in tanning process for the production of leather | Klaus Schumann, Milan J. Schwuger, Heinz Smolka, Emanuel Arndt, Emil Ruscheinsky +1 more | 1981-06-09 |
| 4264318 | Water-insoluble aluminosilicates as tanning agents for the dressing of fur skin | Klaus Schumann, Emanuel Arndt, Emil Ruscheinsky | 1981-04-28 |
| 4264319 | Water-insoluble aluminosilicates in the manufacture of leather | Klaus Schumann, Emanuel Arndt, Emil Ruscheinsky | 1981-04-28 |
| 4260686 | Process for the enzymatic softening of furs | Adolf Asbeck, Hans Pfeiffer, Rolf Schmid | 1981-04-07 |
| 4221564 | Water-insoluble alkali metal aluminosilicates and polycarboxylic acids in the tanning process for the production of leather | Klaus Schumann, Emanuel Arndt, Emil Ruscheinsky | 1980-09-09 |
| 4210416 | Fine-particulate alkali metal aluminosilicates in the process of washing and cleaning rawhides and fur skins | Milan J. Schwuger, Heinz Smolka, Klaus Schumann, Emanuel Arndt, Emil Ruscheinsky | 1980-07-01 |